diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 656a2398..c8953c81 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,12 +17,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9"]
-        django-version: ["2.2", "3.1", "3.2"]
-        # If we wanted to exclude combinations, we could add them here:
-        # exclude:
-          # - python-version: "3.5"
-          #   django-version: "3.0"
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+        django-version: ["3.2", "4.0"]
+        exclude:
+          # Django 4.0 isn't compatible with python 3.6 and 3.7:
+          - python-version: "3.6"
+            django-version: "4.0"
+          - python-version: "3.7"
+            django-version: "4.0"
 
     steps:
       - name: Git clone
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d496cefe..83295c22 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,22 @@ Changelog (Django Ditto)
 Unreleased
 ----------
 
-- None.
+- None
+
+
+2.0.0 - 2022-02-14
+------------------
+
+- **Backwards incompatible:** Drop support for Django 2.2 and 3.1.
+
+- **Backwards incompatible:** Requires django-taggit >= v2.0.0
+  (It changed how `TaggableManager` sets tags: https://github.com/jazzband/django-taggit/blob/master/CHANGELOG.rst#200-2021-11-14 )
+
+- Add support for Django 4.0 (#223)
+
+- Add support for Python 3.10 (#225)
+
+- Add support for importing the "new" (2019-onwwards) format of downloadable Twitter archive (#229).
 
 
 1.4.2 - 2021-10-22
diff --git a/README.md b/README.md
index 9fa014ab..0acc5da5 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Django Ditto
 [![image](https://coveralls.io/repos/github/philgyford/django-ditto/badge.svg?branch=main)](https://coveralls.io/github/philgyford/django-ditto?branch=main "Test coverage")
 [![image](https://readthedocs.org/projects/django-ditto/badge/?version=stable)](https://django-ditto.readthedocs.io/en/stable/?badge=stable "Documentation status")
 
-A collection of Django apps for copying things from third-party sites and services. Requires Python 3.6 to 3.9, and Django 2.2 to 3.2.
+A collection of Django apps for copying things from third-party sites and services. Requires Python 3.6, 3.7, 3.8, 3.9 and 3.10, and Django 3.2 and 4.0.
 
 [Read the documentation.](http://django-ditto.readthedocs.io/en/latest/)
 
diff --git a/devproject/Pipfile b/devproject/Pipfile
index 5cab740f..4ba1f1a3 100644
--- a/devproject/Pipfile
+++ b/devproject/Pipfile
@@ -9,4 +9,4 @@ name = "pypi"
 [dev-packages]
 
 [requires]
-python_version = "3.8"
+python_version = "3.10"
diff --git a/devproject/Pipfile.lock b/devproject/Pipfile.lock
index 30c79a8f..0b358021 100644
--- a/devproject/Pipfile.lock
+++ b/devproject/Pipfile.lock
@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "a4312a937566652422be4831bed9a0ee49896bb5a4e6f7c259425612d32d0f99"
+            "sha256": "aac7c54ec53fc5d8affc83358e9e3d1e054339e4e522d1621fed76230c61ef16"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.8"
+            "python_version": "3.10"
         },
         "sources": [
             {
@@ -16,28 +16,42 @@
         ]
     },
     "default": {
-        "appdirs": {
-            "hashes": [
-                "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41",
-                "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"
-            ],
-            "version": "==1.4.4"
-        },
         "asgiref": {
             "hashes": [
-                "sha256:4ef1ab46b484e3c706329cedeff284a5d40824200638503f5768edb6de7d58e9",
-                "sha256:ffc141aa908e6f175673e7b1b3b7af4fdb0ecb738fc5c8b88f69f055c2415214"
+                "sha256:2f8abc20f7248433085eda803936d98992f1343ddb022065779f37c5da0181d0",
+                "sha256:88d59c13d634dcffe0510be048210188edd79aeccb6a6c9028cdad6f31d730a9"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==3.4.1"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.5.0"
         },
         "black": {
             "hashes": [
-                "sha256:1c7aa6ada8ee864db745b22790a32f94b2795c253a75d6d9b5e439ff10d23116",
-                "sha256:c8373c6491de9362e39271630b65b964607bc5c79c83783547d76c839b3aa219"
+                "sha256:07e5c049442d7ca1a2fc273c79d1aecbbf1bc858f62e8184abe1ad175c4f7cc2",
+                "sha256:0e21e1f1efa65a50e3960edd068b6ae6d64ad6235bd8bfea116a03b21836af71",
+                "sha256:1297c63b9e1b96a3d0da2d85d11cd9bf8664251fd69ddac068b98dc4f34f73b6",
+                "sha256:228b5ae2c8e3d6227e4bde5920d2fc66cc3400fde7bcc74f480cb07ef0b570d5",
+                "sha256:2d6f331c02f0f40aa51a22e479c8209d37fcd520c77721c034517d44eecf5912",
+                "sha256:2ff96450d3ad9ea499fc4c60e425a1439c2120cbbc1ab959ff20f7c76ec7e866",
+                "sha256:3524739d76b6b3ed1132422bf9d82123cd1705086723bc3e235ca39fd21c667d",
+                "sha256:35944b7100af4a985abfcaa860b06af15590deb1f392f06c8683b4381e8eeaf0",
+                "sha256:373922fc66676133ddc3e754e4509196a8c392fec3f5ca4486673e685a421321",
+                "sha256:5fa1db02410b1924b6749c245ab38d30621564e658297484952f3d8a39fce7e8",
+                "sha256:6f2f01381f91c1efb1451998bd65a129b3ed6f64f79663a55fe0e9b74a5f81fd",
+                "sha256:742ce9af3086e5bd07e58c8feb09dbb2b047b7f566eb5f5bc63fd455814979f3",
+                "sha256:7835fee5238fc0a0baf6c9268fb816b5f5cd9b8793423a75e8cd663c48d073ba",
+                "sha256:8871fcb4b447206904932b54b567923e5be802b9b19b744fdff092bd2f3118d0",
+                "sha256:a7c0192d35635f6fc1174be575cb7915e92e5dd629ee79fdaf0dcfa41a80afb5",
+                "sha256:b1a5ed73ab4c482208d20434f700d514f66ffe2840f63a6252ecc43a9bc77e8a",
+                "sha256:c8226f50b8c34a14608b848dc23a46e5d08397d009446353dad45e04af0c8e28",
+                "sha256:ccad888050f5393f0d6029deea2a33e5ae371fd182a697313bdbd835d3edaf9c",
+                "sha256:dae63f2dbf82882fa3b2a3c49c32bffe144970a573cd68d247af6560fc493ae1",
+                "sha256:e2f69158a7d120fd641d1fa9a921d898e20d52e44a74a6fbbcc570a62a6bc8ab",
+                "sha256:efbadd9b52c060a8fc3b9658744091cb33c31f830b3f074422ed27bad2b18e8f",
+                "sha256:f5660feab44c2e3cb24b2419b998846cbb01c23c7fe645fee45087efa3da2d61",
+                "sha256:fdb8754b453fb15fad3f72cd9cad3e16776f0964d67cf30ebcbf10327a3777a3"
             ],
             "markers": "python_full_version >= '3.6.2'",
-            "version": "==21.7b0"
+            "version": "==22.1.0"
         },
         "certifi": {
             "hashes": [
@@ -48,11 +62,11 @@
         },
         "charset-normalizer": {
             "hashes": [
-                "sha256:e019de665e2bcf9c2b64e2e5aa025fa991da8720daa3c1138cadd2fd1856aed0",
-                "sha256:f7af805c321bfa1ce6714c51f254e0d5bb5e5834039bc17db7ebe3a4cec9492b"
+                "sha256:2842d8f5e82a1f6aa437380934d5e1cd4fcf2003b06fed6940769c164a480a45",
+                "sha256:98398a9d69ee80548c762ba991a4728bfc3836768ed226b3945908d1a688371c"
             ],
             "markers": "python_version >= '3'",
-            "version": "==2.0.7"
+            "version": "==2.0.11"
         },
         "click": {
             "hashes": [
@@ -64,27 +78,27 @@
         },
         "django": {
             "hashes": [
-                "sha256:42573831292029639b798fe4d3812996bfe4ff3275f04566da90764daec011a5",
-                "sha256:f6d2c4069c9b9bfac03bedff927ea1f9e0d29e34525cec8a68fd28eb2a8df7af"
+                "sha256:110fb58fb12eca59e072ad59fc42d771cd642dd7a2f2416582aa9da7a8ef954a",
+                "sha256:996495c58bff749232426c88726d8cd38d24c94d7c1d80835aafffa9bc52985a"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==3.2.8"
+            "markers": "python_version >= '3.8'",
+            "version": "==4.0.2"
         },
         "django-appconf": {
             "hashes": [
                 "sha256:ae9f864ee1958c815a965ed63b3fba4874eec13de10236ba063a788f9a17389d",
                 "sha256:be3db0be6c81fa84742000b89a81c016d70ae66a7ccb620cdef592b1f1a6aaa4"
             ],
-            "markers": "python_version >= '3.6'",
+            "markers": "python_version >= '3.1'",
             "version": "==1.0.5"
         },
         "django-debug-toolbar": {
             "hashes": [
-                "sha256:8c5b13795d4040008ee69ba82dcdd259c49db346cf7d0de6e561a49d191f0860",
-                "sha256:d7bab7573fab35b0fd029163371b7182f5826c13da69734beb675c761d06a4d3"
+                "sha256:644bbd5c428d3283aa9115722471769cac1bec189edf3a0c855fd8ff870375a9",
+                "sha256:6b633b6cfee24f232d73569870f19aa86c819d750e7f3e833f2344a9eb4b4409"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.2.2"
+            "version": "==3.2.4"
         },
         "django-ditto": {
             "editable": true,
@@ -95,33 +109,33 @@
         },
         "django-imagekit": {
             "hashes": [
-                "sha256:304c3379f6a5cac387e47ace11195a603ad3cb01e3e951b45489824d25b00359",
-                "sha256:6ec0afb77cdf52cd453c9fc2c10ef350d111edfd6ce53c5977aa8a0e22cee00c"
+                "sha256:87e36f8dc1d8745647881f4366ef4965225f048042dacebbee0dcb87425defef",
+                "sha256:e559aeaae43a33b34f87631a9fa5696455e4451ffa738a42635fde442fedac5c"
             ],
-            "version": "==4.0.2"
+            "version": "==4.1.0"
         },
         "django-sortedm2m": {
             "hashes": [
-                "sha256:091e00e12b399ffd8fc74ebf4cc0f14d0bc0e28961c4ac714ca88ae24bd96aa3",
-                "sha256:8acc3638b7a2587533c7776deaa2c6c035220c8f9fff85ed67858a9c6bf51e7c"
+                "sha256:136f3d4e0820b351608a7141d88ac3ba7fafcd37a9b8361ad00ffe616a790be5",
+                "sha256:c67ae0757e8e60ded15a9ba04d0862fe39fba3d5b865899c2472166ff0050f2c"
             ],
-            "version": "==3.0.2"
+            "version": "==3.1.1"
         },
         "django-taggit": {
             "hashes": [
-                "sha256:dfe9e9c10b5929132041de0c00093ef0072c73c2a97d0f74a818ae50fa77149a",
-                "sha256:e5bb62891f458d55332e36a32e19c08d20142c43f74bc5656c803f8af25c084a"
+                "sha256:61547a23fc99967c9304107414a09e662b459f4163dbbae32e60b8ba40c34d05",
+                "sha256:a9f41e4ad58efe4b28d86f274728ee87eb98eeae90c9eb4b4efad39e5068184e"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==1.5.1"
+            "version": "==2.1.0"
         },
         "flake8": {
             "hashes": [
-                "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b",
-                "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"
+                "sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d",
+                "sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==3.9.2"
+            "markers": "python_version >= '3.6'",
+            "version": "==4.0.1"
         },
         "flickrapi": {
             "hashes": [
@@ -154,11 +168,11 @@
         },
         "oauthlib": {
             "hashes": [
-                "sha256:42bf6354c2ed8c6acb54d971fce6f88193d97297e18602a3a886603f9d7730cc",
-                "sha256:8f0215fcc533dd8dd1bee6f4c412d4f0cd7297307d43ac61666389e3bc3198a3"
+                "sha256:23a8208d75b902797ea29fd31fa80a15ed9dc2c6c16fe73f5d346f83f6fa27a2",
+                "sha256:6db33440354787f9b7f3a6dbd4febf5d0f93758354060e802f6c06cb493022fe"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.1.1"
+            "version": "==3.2.0"
         },
         "pathspec": {
             "hashes": [
@@ -175,66 +189,68 @@
         },
         "pillow": {
             "hashes": [
-                "sha256:066f3999cb3b070a95c3652712cffa1a748cd02d60ad7b4e485c3748a04d9d76",
-                "sha256:0a0956fdc5defc34462bb1c765ee88d933239f9a94bc37d132004775241a7585",
-                "sha256:0b052a619a8bfcf26bd8b3f48f45283f9e977890263e4571f2393ed8898d331b",
-                "sha256:1394a6ad5abc838c5cd8a92c5a07535648cdf6d09e8e2d6df916dfa9ea86ead8",
-                "sha256:1bc723b434fbc4ab50bb68e11e93ce5fb69866ad621e3c2c9bdb0cd70e345f55",
-                "sha256:244cf3b97802c34c41905d22810846802a3329ddcb93ccc432870243211c79fc",
-                "sha256:25a49dc2e2f74e65efaa32b153527fc5ac98508d502fa46e74fa4fd678ed6645",
-                "sha256:2e4440b8f00f504ee4b53fe30f4e381aae30b0568193be305256b1462216feff",
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-                "sha256:493cb4e415f44cd601fcec11c99836f707bb714ab03f5ed46ac25713baf0ff20",
-                "sha256:4acc0985ddf39d1bc969a9220b51d94ed51695d455c228d8ac29fcdb25810e6e",
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-                "sha256:5b7bb9de00197fb4261825c15551adf7605cf14a80badf1761d61e59da347779",
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-                "sha256:620582db2a85b2df5f8a82ddeb52116560d7e5e6b055095f04ad828d1b0baa39",
-                "sha256:62cc1afda735a8d109007164714e73771b499768b9bb5afcbbee9d0ff374b43f",
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-                "sha256:72b9e656e340447f827885b8d7a15fc8c4e68d410dc2297ef6787eec0f0ea409",
-                "sha256:72cbcfd54df6caf85cc35264c77ede902452d6df41166010262374155947460c",
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-                "sha256:7b7017b61bbcdd7f6363aeceb881e23c46583739cb69a3ab39cb384f6ec82e5b",
-                "sha256:81f8d5c81e483a9442d72d182e1fb6dcb9723f289a57e8030811bac9ea3fef8d",
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-                "sha256:84c471a734240653a0ec91dec0996696eea227eafe72a33bd06c92697728046b",
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-                "sha256:a4901622493f88b1a29bd30ec1a2f683782e57c3c16a2dbc7f2595ba01f639df",
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-                "sha256:b8831cb7332eda5dc89b21a7bce7ef6ad305548820595033a4b03cf3091235ed",
-                "sha256:b8e2f83c56e141920c39464b852de3719dfbfb6e3c99a2d8da0edf4fb33176ed",
-                "sha256:c70e94281588ef053ae8998039610dbd71bc509e4acbc77ab59d7d2937b10698",
-                "sha256:c8a17b5d948f4ceeceb66384727dde11b240736fddeda54ca740b9b8b1556b29",
-                "sha256:d82cdb63100ef5eedb8391732375e6d05993b765f72cb34311fab92103314649",
-                "sha256:d89363f02658e253dbd171f7c3716a5d340a24ee82d38aab9183f7fdf0cdca49",
-                "sha256:d99ec152570e4196772e7a8e4ba5320d2d27bf22fdf11743dd882936ed64305b",
-                "sha256:ddc4d832a0f0b4c52fff973a0d44b6c99839a9d016fe4e6a1cb8f3eea96479c2",
-                "sha256:e3dacecfbeec9a33e932f00c6cd7996e62f53ad46fbe677577394aaa90ee419a",
-                "sha256:eb9fc393f3c61f9054e1ed26e6fe912c7321af2f41ff49d3f83d05bacf22cc78"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==8.4.0"
+                "sha256:011233e0c42a4a7836498e98c1acf5e744c96a67dd5032a6f666cc1fb97eab97",
+                "sha256:0f29d831e2151e0b7b39981756d201f7108d3d215896212ffe2e992d06bfe049",
+                "sha256:12875d118f21cf35604176872447cdb57b07126750a33748bac15e77f90f1f9c",
+                "sha256:14d4b1341ac07ae07eb2cc682f459bec932a380c3b122f5540432d8977e64eae",
+                "sha256:1c3c33ac69cf059bbb9d1a71eeaba76781b450bc307e2291f8a4764d779a6b28",
+                "sha256:1d19397351f73a88904ad1aee421e800fe4bbcd1aeee6435fb62d0a05ccd1030",
+                "sha256:253e8a302a96df6927310a9d44e6103055e8fb96a6822f8b7f514bb7ef77de56",
+                "sha256:2632d0f846b7c7600edf53c48f8f9f1e13e62f66a6dbc15191029d950bfed976",
+                "sha256:335ace1a22325395c4ea88e00ba3dc89ca029bd66bd5a3c382d53e44f0ccd77e",
+                "sha256:413ce0bbf9fc6278b2d63309dfeefe452835e1c78398efb431bab0672fe9274e",
+                "sha256:5100b45a4638e3c00e4d2320d3193bdabb2d75e79793af7c3eb139e4f569f16f",
+                "sha256:514ceac913076feefbeaf89771fd6febde78b0c4c1b23aaeab082c41c694e81b",
+                "sha256:528a2a692c65dd5cafc130de286030af251d2ee0483a5bf50c9348aefe834e8a",
+                "sha256:6295f6763749b89c994fcb6d8a7f7ce03c3992e695f89f00b741b4580b199b7e",
+                "sha256:6c8bc8238a7dfdaf7a75f5ec5a663f4173f8c367e5a39f87e720495e1eed75fa",
+                "sha256:718856856ba31f14f13ba885ff13874be7fefc53984d2832458f12c38205f7f7",
+                "sha256:7f7609a718b177bf171ac93cea9fd2ddc0e03e84d8fa4e887bdfc39671d46b00",
+                "sha256:80ca33961ced9c63358056bd08403ff866512038883e74f3a4bf88ad3eb66838",
+                "sha256:80fe64a6deb6fcfdf7b8386f2cf216d329be6f2781f7d90304351811fb591360",
+                "sha256:81c4b81611e3a3cb30e59b0cf05b888c675f97e3adb2c8672c3154047980726b",
+                "sha256:855c583f268edde09474b081e3ddcd5cf3b20c12f26e0d434e1386cc5d318e7a",
+                "sha256:9bfdb82cdfeccec50aad441afc332faf8606dfa5e8efd18a6692b5d6e79f00fd",
+                "sha256:a5d24e1d674dd9d72c66ad3ea9131322819ff86250b30dc5821cbafcfa0b96b4",
+                "sha256:a9f44cd7e162ac6191491d7249cceb02b8116b0f7e847ee33f739d7cb1ea1f70",
+                "sha256:b5b3f092fe345c03bca1e0b687dfbb39364b21ebb8ba90e3fa707374b7915204",
+                "sha256:b9618823bd237c0d2575283f2939655f54d51b4527ec3972907a927acbcc5bfc",
+                "sha256:cef9c85ccbe9bee00909758936ea841ef12035296c748aaceee535969e27d31b",
+                "sha256:d21237d0cd37acded35154e29aec853e945950321dd2ffd1a7d86fe686814669",
+                "sha256:d3c5c79ab7dfce6d88f1ba639b77e77a17ea33a01b07b99840d6ed08031cb2a7",
+                "sha256:d9d7942b624b04b895cb95af03a23407f17646815495ce4547f0e60e0b06f58e",
+                "sha256:db6d9fac65bd08cea7f3540b899977c6dee9edad959fa4eaf305940d9cbd861c",
+                "sha256:ede5af4a2702444a832a800b8eb7f0a7a1c0eed55b644642e049c98d589e5092",
+                "sha256:effb7749713d5317478bb3acb3f81d9d7c7f86726d41c1facca068a04cf5bb4c",
+                "sha256:f154d173286a5d1863637a7dcd8c3437bb557520b01bddb0be0258dcb72696b5",
+                "sha256:f25ed6e28ddf50de7e7ea99d7a976d6a9c415f03adcaac9c41ff6ff41b6d86ac"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==9.0.1"
+        },
+        "platformdirs": {
+            "hashes": [
+                "sha256:30671902352e97b1eafd74ade8e4a694782bd3471685e78c32d0fdfd3aa7e7bb",
+                "sha256:8ec11dfba28ecc0715eb5fb0147a87b1bf325f349f3da9aab2cd6b50b96b692b"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.5.0"
         },
         "pycodestyle": {
             "hashes": [
-                "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068",
-                "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"
+                "sha256:720f8b39dde8b293825e7ff02c475f3077124006db4f440dcbc9a20b76548a20",
+                "sha256:eddd5847ef438ea1c7870ca7eb78a9d47ce0cdb4851a5523949f2601d0cbbe7f"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.7.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==2.8.0"
         },
         "pyflakes": {
             "hashes": [
-                "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3",
-                "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"
+                "sha256:05a85c2872edf37a4ed30b0cce2f6093e1d0581f8c19d7393122da7e25b2b24c",
+                "sha256:3bb3a3f256f4b7968c9c788781e4ff07dce46bdf12339dcda61053375426ee2e"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.3.1"
+            "version": "==2.4.0"
         },
         "python-dateutil": {
             "editable": true,
@@ -250,62 +266,21 @@
             ],
             "version": "==2021.3"
         },
-        "regex": {
-            "hashes": [
-                "sha256:0f82de529d7595011a40573cc0f27422e59cafa94943b64a4d17d966d75f2c01",
-                "sha256:130a002fa386c976615a2f6d6dff0fcc25da24858994a36b14d2e3129dce7de2",
-                "sha256:164e51ace4d00f07c519f85ec2209e8faaeab18bc77be6b35685c18d4ac1c22a",
-                "sha256:19c4fd59747236423016ccd89b9a6485d958bf1aa7a8a902a6ba28029107a87f",
-                "sha256:201890fdc8a65396cfb6aa4493201353b2a6378e27d2de65234446f8329233cb",
-                "sha256:2044174af237bb9c56ecc07294cf38623ee379e8dca14b01e970f8b015c71917",
-                "sha256:2ff91696888755e96230138355cbe8ce2965d930d967d6cff7c636082d038c78",
-                "sha256:3b5a0660a63b0703380758a7141b96cc1c1a13dee2b8e9c280a2522962fd12af",
-                "sha256:468de52dd3f20187ab5ca4fd265c1bea61a5346baef01ad0333a5e89fa9fad29",
-                "sha256:4832736b3f24617e63dc919ce8c4215680ba94250a5d9e710fcc0c5f457b5028",
-                "sha256:5b75a3db3aab0bfa51b6af3f820760779d360eb79f59e32c88c7fba648990b4f",
-                "sha256:678d9a4ce79e1eaa4ebe88bc9769df52919eb30c597576a0deba1f3cf2360e65",
-                "sha256:72a0b98d41c4508ed23a96eef41090f78630b44ba746e28cd621ecbe961e0a16",
-                "sha256:740a28580520b099b804776db1e919360fcbf30a734a14c5985d5e39a39e7237",
-                "sha256:74d03c256cf0aed81997e87be8e24297b5792c9718f3a735f5055ddfad392f06",
-                "sha256:8bd83d9b8ee125350cd666b55294f4bc9993c4f0d9b1be9344a318d0762e94cc",
-                "sha256:98743a2d827a135bf3390452be18d95839b947a099734d53c17e09a64fc09480",
-                "sha256:98fe0e1b07a314f0a86dc58af4e717c379d48a403eddd8d966ab9b8bf91ce164",
-                "sha256:9c613d797a3790f6b12e78a61e1cd29df7fc88135218467cf8b0891353292b9c",
-                "sha256:9cd14f22425beecf727f6dbdf5c893e46ecbc5ff16197c16a6f38a9066f2d4d5",
-                "sha256:ad1fedca001fefc3030d1e9022b038af429e58dc06a7e9c55e40bd1f834582ec",
-                "sha256:b9dfba513eae785e3d868803f5a7e21a032cb2b038fa4a1ea7ec691037426ad3",
-                "sha256:bc4637390235f1e3e2fcdd3e904ca0b42aa655ae28a78072248b2992b4ad4c08",
-                "sha256:c0f49f1f03be3e4a5faaadc35db7afa2b83a871943b889f9f7bba56e0e2e8bd5",
-                "sha256:c5a2ac760f2fc13a1c58131ec217779911890899ce1a0a63c9409bd23fecde6f",
-                "sha256:d6432daf42f2c487b357e1aa0bdc43193f050ff53a3188bfab20b88202b53027",
-                "sha256:dc1a9bedf389bf3d3627a4d2b21cbdc5fe5e0f029d1f465972f4437833dcc946",
-                "sha256:de7dbf72ae80f06e79444ff9614fb5e3a7956645d513b0e12d1bbe6f3ccebd11",
-                "sha256:ded4748c7be6f31fb207387ee83a3a0f625e700defe32f268cb1d350ed6e4a66",
-                "sha256:e39eafa854e469d7225066c806c76b9a0acba5ff5ce36c82c0224b75e24888f2",
-                "sha256:edff4e31d159672a7b9d70164b21289e4b53b239ce1dc945bf9643d266537573",
-                "sha256:f1b23304855303bd97b5954edab63b8ddd56c91c41c6d4eba408228c0bae95f3",
-                "sha256:f3da121de36a9ead0f32b44ea720ee8c87edbb59dca6bb980d18377d84ad58a3",
-                "sha256:f68c71aabb10b1352a06515e25a425a703ba85660ae04cf074da5eb91c0af5e5",
-                "sha256:f82d3adde46ac9188db3aa7e6e1690865ebb6448d245df5a3ea22284f70d9e46",
-                "sha256:fd1bfc6b7347de9f0ae1fb6f9080426bed6a9ca55b5766fa4fdf7b3a29ccae9c"
-            ],
-            "version": "==2021.10.21"
-        },
         "requests": {
             "hashes": [
-                "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24",
-                "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"
+                "sha256:68d7c56fd5a8999887728ef304a6d12edc7be74f1cfa47714fc8b414525c9a61",
+                "sha256:f22fa1e554c9ddfd16e6e41ac79759e17be9e492b3587efa038054674760e72d"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
-            "version": "==2.26.0"
+            "version": "==2.27.1"
         },
         "requests-oauthlib": {
             "hashes": [
-                "sha256:7f71572defaecd16372f9006f33c2ec8c077c3cfa6f5911a9a90202beb513f3d",
-                "sha256:b4261601a71fd721a8bd6d7aa1cc1d6a8a93b4a9f5e96626f8e4d91e8beeaa6a",
-                "sha256:fa6c47b933f01060936d87ae9327fead68768b69c6c9ea2109c48be30f2d4dbc"
+                "sha256:2577c501a2fb8d05a304c09d090d6e47c306fef15809d102b327cf8364bddab5",
+                "sha256:75beac4a47881eeb94d5ea5d6ad31ef88856affe2332b9aafb52c6452ccf0d7a"
             ],
-            "version": "==1.3.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.3.1"
         },
         "requests-toolbelt": {
             "hashes": [
@@ -332,11 +307,11 @@
         },
         "tomli": {
             "hashes": [
-                "sha256:8dd0e9524d6f386271a36b41dbf6c57d8e32fd96fd22b6584679dc569d20899f",
-                "sha256:a5b75cb6f3968abb47af1b40c1819dc519ea82bcc065776a866e8d74c5ca9442"
+                "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc",
+                "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==1.2.1"
+            "markers": "python_version >= '3.7'",
+            "version": "==2.0.1"
         },
         "twitter-text-python": {
             "hashes": [
@@ -354,11 +329,11 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece",
-                "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
+                "sha256:000ca7f471a233c2251c6c7023ee85305721bfdf18621ebff4fd17a8653427ed",
+                "sha256:0e7c33d9a63e7ddfcb86780aac87befc2fbddf46c58dbb487e0855f7ceec283c"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-            "version": "==1.26.7"
+            "version": "==1.26.8"
         }
     },
     "develop": {}
diff --git a/devproject/devproject/settings.py b/devproject/devproject/settings.py
index 646a0872..e9070175 100644
--- a/devproject/devproject/settings.py
+++ b/devproject/devproject/settings.py
@@ -113,6 +113,10 @@ def get_env_variable(var_name, default=None):
             "handlers": ["console"],
             "level": os.getenv("DJANGO_LOG_LEVEL", "INFO"),
         },
+        "ditto": {
+            "handlers": ["console"],
+            "level": os.getenv("DJANGO_LOG_LEVEL", "INFO"),
+        },
         "ditto.management_commands": {
             "handlers": ["console"],
             "level": os.getenv("DJANGO_LOG_LEVEL", "INFO"),
diff --git a/ditto/__init__.py b/ditto/__init__.py
index 6056b16d..2bec2a89 100644
--- a/ditto/__init__.py
+++ b/ditto/__init__.py
@@ -1,5 +1,5 @@
 __title__ = "Django Ditto"
-__version__ = "1.4.2"
+__version__ = "2.0.0"
 __author__ = "Phil Gyford"
 __author_email__ = "phil@gyford.com"
 __license__ = "MIT"
diff --git a/ditto/core/views.py b/ditto/core/views.py
index 9c8a1613..80786bf6 100644
--- a/ditto/core/views.py
+++ b/ditto/core/views.py
@@ -7,8 +7,8 @@
 from django.urls import reverse
 from django.http import Http404
 from django.shortcuts import redirect
-from django.utils.encoding import force_str, force_text
-from django.utils.translation import ugettext as _
+from django.utils.encoding import force_str
+from django.utils.translation import gettext as _
 from django.views.generic import ListView, TemplateView
 from django.views.generic import DayArchiveView as DjangoDayArchiveView
 
@@ -574,7 +574,7 @@ def get_variety_counts(self):
                     raise Http404(
                         _("No %(verbose_name_plural)s available")
                         % {
-                            "verbose_name_plural": force_text(
+                            "verbose_name_plural": force_str(
                                 qs.model._meta.verbose_name_plural
                             )
                         }
diff --git a/ditto/flickr/views.py b/ditto/flickr/views.py
index 22110711..83bd5d18 100644
--- a/ditto/flickr/views.py
+++ b/ditto/flickr/views.py
@@ -1,5 +1,5 @@
 from django.http import Http404
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django.views.generic import DetailView, ListView
 from django.views.generic.detail import SingleObjectMixin
 
diff --git a/ditto/lastfm/views.py b/ditto/lastfm/views.py
index af1ff684..1499018f 100644
--- a/ditto/lastfm/views.py
+++ b/ditto/lastfm/views.py
@@ -1,7 +1,7 @@
 from datetime import timedelta
 
 from django.http import Http404
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django.views.generic import DetailView, TemplateView
 from django.views.generic.detail import SingleObjectMixin
 
diff --git a/ditto/pinboard/fetch.py b/ditto/pinboard/fetch.py
index 59353f89..5cd1a27d 100644
--- a/ditto/pinboard/fetch.py
+++ b/ditto/pinboard/fetch.py
@@ -225,7 +225,7 @@ def _save_bookmark(self, bookmark, fetch_time, account):
             },
         )
 
-        bookmark_obj.tags.set(*bookmark["tags"])
+        bookmark_obj.tags.set(bookmark["tags"])
 
 
 class AllBookmarksFetcher(BookmarksFetcher):
diff --git a/ditto/pinboard/views.py b/ditto/pinboard/views.py
index bb1751b8..3b9ede69 100644
--- a/ditto/pinboard/views.py
+++ b/ditto/pinboard/views.py
@@ -1,5 +1,5 @@
 from django.http import Http404
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django.views.generic import DetailView, ListView
 from django.views.generic.detail import SingleObjectMixin
 
diff --git a/ditto/twitter/admin.py b/ditto/twitter/admin.py
index dd2754c8..e2dcdaf8 100644
--- a/ditto/twitter/admin.py
+++ b/ditto/twitter/admin.py
@@ -17,7 +17,15 @@ class AccountAdmin(admin.ModelAdmin):
     )
 
     fieldsets = (
-        (None, {"fields": ("user", "is_active",)}),
+        (
+            None,
+            {
+                "fields": (
+                    "user",
+                    "is_active",
+                )
+            },
+        ),
         (
             "API",
             {
@@ -29,7 +37,8 @@ class AccountAdmin(admin.ModelAdmin):
                 ),
                 "description": (
                     "Keys and secrets require creation of an app at "
-                    '<a href="https://apps.twitter.com/">apps.twitter.com</a>'
+                    '<a href="https://developer.twitter.com/portal">'
+                    "developer.twitter.com/portal</a>"
                 ),
             },
         ),
@@ -123,7 +132,13 @@ class MediaAdmin(admin.ModelAdmin):
         ),
         (
             "Data",
-            {"classes": ("collapse",), "fields": ("time_created", "time_modified",)},
+            {
+                "classes": ("collapse",),
+                "fields": (
+                    "time_created",
+                    "time_modified",
+                ),
+            },
         ),
     )
 
@@ -240,7 +255,12 @@ class TweetAdmin(DittoItemModelAdmin):
             "Data",
             {
                 "classes": ("collapse",),
-                "fields": ("raw", "fetch_time", "time_created", "time_modified",),
+                "fields": (
+                    "raw",
+                    "fetch_time",
+                    "time_created",
+                    "time_modified",
+                ),
             },
         ),
     )
@@ -309,7 +329,17 @@ class UserAdmin(admin.ModelAdmin):
                 )
             },
         ),
-        ("Data", {"fields": ("raw", "fetch_time", "time_created", "time_modified",)}),
+        (
+            "Data",
+            {
+                "fields": (
+                    "raw",
+                    "fetch_time",
+                    "time_created",
+                    "time_modified",
+                )
+            },
+        ),
     )
 
     formfield_overrides = {
diff --git a/ditto/twitter/fetch/savers.py b/ditto/twitter/fetch/savers.py
index b2775f87..51783a40 100644
--- a/ditto/twitter/fetch/savers.py
+++ b/ditto/twitter/fetch/savers.py
@@ -59,7 +59,6 @@ def save_user(self, user, fetch_time, download_avatar=True):
             "raw": raw_json,
             "screen_name": user["screen_name"],
             "name": user["name"],
-            "is_private": user["protected"],
             "is_verified": user["verified"],
             "profile_image_url_https": user["profile_image_url_https"],
         }
@@ -67,6 +66,9 @@ def save_user(self, user, fetch_time, download_avatar=True):
         # When ingesting tweets there are lots of fields the 'user' element
         # doesn't have, compared to the API:
 
+        if "protected" in user:
+            defaults["is_private"] = user["protected"]
+
         if "created_at" in user:
             defaults["created_at"] = self._api_time_to_datetime(user["created_at"])
 
@@ -265,7 +267,7 @@ def save_media(self, tweet):
 
         return media_count
 
-    def save_tweet(self, tweet, fetch_time):
+    def save_tweet(self, tweet, fetch_time, user_data=None):
         """Takes a dict of tweet data from the API and creates or updates a
         Tweet object and its associated User object.
 
@@ -286,15 +288,21 @@ def save_tweet(self, tweet, fetch_time):
                 tweet["created_at"], time_format="%Y-%m-%d %H:%M:%S +0000"
             )
 
-        user = UserSaver().save_user(tweet["user"], fetch_time)
+        if user_data is None:
+            if "user" in tweet:
+                user_data = tweet["user"]
+            else:
+                raise ValueError("No user data found to save tweets with")
+
+        user = UserSaver().save_user(user_data, fetch_time)
 
         if "full_text" in tweet:
             # For new (2016) 'extended' format tweet data.
             # https://dev.twitter.com/overview/api/upcoming-changes-to-tweets
             text = tweet["full_text"]
             # Cuts off any @usernames at the start and a trailing URL at the end:
-            frm = tweet["display_text_range"][0]
-            to = tweet["display_text_range"][1]
+            frm = int(tweet["display_text_range"][0])
+            to = int(tweet["display_text_range"][1])
             title = text[frm:to]
         else:
             # Older 'classic' format tweet data.
diff --git a/ditto/twitter/ingest.py b/ditto/twitter/ingest.py
index eb07d7bb..5ec22ecd 100644
--- a/ditto/twitter/ingest.py
+++ b/ditto/twitter/ingest.py
@@ -1,8 +1,11 @@
-# coding: utf-8
 import json
 import os
+from urllib.parse import urlparse
+
+from django.core.files import File
 
 from .fetch.savers import TweetSaver
+from .models import Media
 from ..core.utils import datetime_now
 
 
@@ -37,6 +40,9 @@ def __init__(self):
         # How mnay tweets we found in all the files:
         self.tweet_count = 0
 
+        # How many media files we imported:
+        self.media_count = 0
+
         # Stores all the imported data from the files before saving.
         # So that we know we've got through all the files within JSON errors
         # etc before we begin touching the DB.
@@ -46,21 +52,71 @@ def ingest(self, directory):
         """Import all the tweet data and create/update the tweets."""
 
         self._load_data(directory)
-        self._save_tweets()
+
+        self._save_tweets(directory)
+
+        self._save_media(directory)
+
         if self.tweet_count > 0:
             return {
                 "success": True,
                 "tweets": self.tweet_count,
                 "files": self.file_count,
+                "media": self.media_count,
             }
         else:
             return {
                 "success": False,
                 "tweets": 0,
                 "files": self.file_count,
+                "media": self.media_count,
                 "messages": ["No tweets were found"],
             }
 
+    def _load_data(self, directory):
+        """
+        Child classes must implement their own _load_data() method.
+
+        It should populate self.tweets_data with a list of dicts, each
+        one being data about a single tweet.
+
+        And it should set self.file_count to be the number of JS files
+        we import the data from.
+        """
+        raise NotImplementedError(
+            "Child classes of TweetImporter must implement their own "
+            "_load_data() method."
+        )
+
+    def _save_tweets(self, directory):
+        """Go through the list of dicts that is self.tweets_data and
+        create/update each tweet in the DB.
+        """
+        if len(self.tweets_data) == 0:
+            return
+
+        for tweet in self.tweets_data:
+            TweetSaver().save_tweet(tweet, self.fetch_time)
+            self.tweet_count += 1
+
+    def _save_media(self, directory):
+        """Save media files.
+        Not doing anything by default.
+        """
+        pass
+
+
+class Version1TweetIngester(TweetIngester):
+    """
+    Used for the old (original?) format of twitter archives, which contained
+    three files and five folders, including data/js/tweets/ which contained
+    a .js file for every month, like 2016_02.js. This is what we import
+    the tweet data from.
+
+    Sometime in 2019, between January and May, the format changed to
+    what we call version 2.
+    """
+
     def _load_data(self, directory):
         """Goes through all the *.js files in `directory` and puts the tweet
         data inside into self.tweets_data.
@@ -72,7 +128,7 @@ def _load_data(self, directory):
         directory -- The directory to load the files from.
 
         Raises:
-        FetchError -- If the directory is invalid, or there are no .js files,
+        IngestError -- If the directory is invalid, or there are no .js files,
             or we can't load JSON from one of the files.
         """
         try:
@@ -100,19 +156,159 @@ def _get_data_from_file(self, filepath):
         lines = lines[1:]
         try:
             tweets_data = json.loads("".join(lines))
-        except ValueError:
-            raise IngestError("Could not load JSON from %s" % filepath)
+        except ValueError as e:
+            raise IngestError(f"Could not load JSON from {filepath}: {e}")
         else:
             self.tweets_data.extend(tweets_data)
         f.close()
 
-    def _save_tweets(self):
-        """Go through the list of dicts that is self.tweets_data and
-        create/update each tweet in the DB.
+
+class Version2TweetIngester(TweetIngester):
+    """
+    Used for what we call the version 2 format of twitter archive, which
+    was introduced sometime between January and May of 2019.
+
+    It contains two directories - assets and data - and a "Your archive.html" file.
+
+    This not only saves the Tweet objects but also imports media from the
+    tweet_media directory, saving it as Media files .
+    """
+
+    def __init__(self):
+        super().__init__()
+
+        # Tweets in this format don't contain data about the user.
+        # So we create and store that once, in this separate field.
+        self.user_data = {}
+
+    def _load_data(self, directory):
+        """
+        Generate the user data and load all the tweets' data
+        In this archive format, the tweets contain no data about the user.
+        So we create a user data dict to use when saving the tweets.
+        """
+
+        self.user_data = self._construct_user_data(directory)
+
+        self.tweets_data = self._get_json_from_file(directory, "tweet.js")
+
+        self.file_count = 1
+
+    def _save_tweets(self, directory):
+        """
+        Save the tweets with our constructed user data.
         """
         if len(self.tweets_data) == 0:
             return
 
         for tweet in self.tweets_data:
-            TweetSaver().save_tweet(tweet, self.fetch_time)
+            # Here we pass in our user_data too, so save_tweet() can use
+            # that in lieu of the data that is usually within each tweet's data.
+            TweetSaver().save_tweet(tweet["tweet"], self.fetch_time, self.user_data)
             self.tweet_count += 1
+
+    def _save_media(self, directory):
+        """
+        Save any animated gif's mp4 or an image's file for the saved tweets.
+        """
+
+        for t in self.tweets_data:
+            tweet = t["tweet"]
+
+            if "extended_entities" in tweet and "media" in tweet["extended_entities"]:
+                for item in tweet["extended_entities"]["media"]:
+                    try:
+                        media_obj = Media.objects.get(twitter_id=int(item["id"]))
+                    except Media.DoesNotExist:
+                        pass
+                    else:
+                        if (
+                            media_obj.media_type != "video"
+                            and media_obj.has_file is False
+                        ):
+                            # We don't save video files - only image files, and mp4s
+                            # for # GIFs - and only want to do this if we don't already
+                            # have a file.
+
+                            if (
+                                media_obj.media_type == "animated_gif"
+                                and media_obj.mp4_url
+                            ):
+                                url = media_obj.mp4_url
+                            elif (
+                                media_obj.media_type == "photo" and media_obj.image_url
+                            ):
+                                url = media_obj.image_url
+
+                            if url:
+                                # Work out name of file in the tweet_media directory:
+                                parsed_url = urlparse(url)
+                                filename = os.path.basename(parsed_url.path)
+                                local_filename = f"{tweet['id_str']}-{filename}"
+                                filepath = os.path.join(
+                                    directory, "tweet_media", local_filename
+                                )
+
+                                django_file = File(open(filepath, "rb"))
+
+                                if media_obj.media_type == "animated_gif":
+                                    # When we fetch GIFs we also fetch an image file for
+                                    # them. But their images aren't included in the
+                                    # downloaded archive so we'll make do without here.
+                                    media_obj.mp4_file.save(filename, django_file)
+                                    self.media_count += 1
+                                elif media_obj.media_type == "photo":
+                                    media_obj.image_file.save(filename, django_file)
+                                    self.media_count += 1
+
+    def _construct_user_data(self, directory):
+        """
+        Make a single dict of data about a user like we'd get from the API.
+        This data is in several separate files in the download so we need to
+        piece it together from those.
+        """
+
+        account_data = self._get_json_from_file(directory, "account.js")
+
+        profile_data = self._get_json_from_file(directory, "profile.js")
+
+        verified_data = self._get_json_from_file(directory, "verified.js")
+
+        try:
+            user_data = {
+                "id": int(account_data[0]["account"]["accountId"]),
+                "id_str": account_data[0]["account"]["accountId"],
+                "screen_name": account_data[0]["account"]["username"],
+                "name": account_data[0]["account"]["accountDisplayName"],
+                "profile_image_url_https": profile_data[0]["profile"]["avatarMediaUrl"],
+                "verified": verified_data[0]["verified"]["verified"],
+                # So that we don't mistake this for coming from the API when
+                # we save the JSON:
+                "ditto_note": (
+                    "This user data was compiled from separate parts of a "
+                    "downloaded twitter archive by Django Ditto"
+                ),
+            }
+        except KeyError as e:
+            raise ImportError(f"Error creating user data: {e}")
+
+        return user_data
+
+    def _get_json_from_file(self, directory, filepath):
+        filepath = os.path.join(directory, filepath)
+        try:
+            f = open(filepath)
+        except OSError as e:
+            raise ImportError(e)
+
+        lines = f.readlines()
+        # Remove first line, that contains JavaScript:
+        lines = ["["] + lines[1:]
+
+        try:
+            data = json.loads("".join(lines))
+        except ValueError as e:
+            raise IngestError(f"Could not load JSON from {filepath}: {e}")
+        else:
+            f.close()
+            return data
diff --git a/ditto/twitter/management/commands/import_twitter_tweets.py b/ditto/twitter/management/commands/import_twitter_tweets.py
index e7c183bd..b8c35cde 100644
--- a/ditto/twitter/management/commands/import_twitter_tweets.py
+++ b/ditto/twitter/management/commands/import_twitter_tweets.py
@@ -3,7 +3,7 @@
 
 from django.core.management.base import BaseCommand, CommandError
 
-from ...ingest import TweetIngester
+from ...ingest import Version1TweetIngester, Version2TweetIngester
 
 
 class Command(BaseCommand):
@@ -24,28 +24,52 @@ def add_arguments(self, parser):
             help="Path to the directory that is the archive",
         )
 
+        parser.add_argument(
+            "--archive-version",
+            action="store",
+            default=None,
+            help="v1 or v2 (default). Which format of archives to import from.",
+        )
+
     def handle(self, *args, **options):
         # Location of the directory holding the tweet JSON files within the
         # archive:
-        subpath = "/data/js/tweets"
+
+        ingester_class = None
+
+        # For v2, the default:
+        # Where the JS files are:
+        subpath = "/data"
+        ingester_class = Version2TweetIngester
+
+        if options["archive_version"]:
+            if options["archive_version"] == "v1":
+                # Where the JS files are:
+                subpath = "/data/js/tweets"
+                ingester_class = Version1TweetIngester
+
+            elif options["archive_version"] != "v2":
+                raise CommandError(
+                    f"version should be v1 or v2, not '{options['archive_version']}"
+                )
 
         if options["path"]:
             if os.path.isdir(options["path"]):
-                tweets_dir = "%s%s" % (options["path"], subpath)
-                if os.path.isdir(tweets_dir):
-                    result = TweetIngester().ingest(directory=tweets_dir)
+                js_dir = "%s%s" % (options["path"], subpath)
+                if os.path.isdir(js_dir):
+                    result = ingester_class().ingest(directory=js_dir)
                 else:
                     raise CommandError(
-                        "Expected to find a directory at '%s' containing JSON files"
-                        % tweets_dir
+                        f"Expected to find a directory at '{js_dir}' "
+                        "containing .js file(s)"
                     )
             else:
-                raise CommandError("Can't find a directory at '%s'" % options["path"])
+                raise CommandError(f"Can't find a directory at '{options['path']}'")
         else:
             raise CommandError(
                 (
-                    "Specify the location of the archive, "
-                    "e.g. --path=/Path/To/1234567890_abcdefg12345"
+                    "Specify the location of the archive directory, "
+                    "e.g. --path=/path/to/twitter-2022-01-31-abcdef123456"
                 )
             )
 
@@ -53,13 +77,13 @@ def handle(self, *args, **options):
             if result["success"]:
                 tweetnoun = "tweet" if result["tweets"] == 1 else "tweets"
                 filenoun = "file" if result["files"] == 1 else "files"
+                mediafilenoun = "file" if result["media"] == 1 else "files"
 
                 self.stdout.write(
-                    "Imported %s %s from %s %s"
-                    % (result["tweets"], tweetnoun, result["files"], filenoun)
+                    f"Imported {result['tweets']} {tweetnoun} from "
+                    f"{result['files']} {filenoun}, "
+                    f"and {result['media']} media {mediafilenoun}"
                 )
             else:
 
-                self.stderr.write(
-                    "Failed to import tweets: %s" % (result["messages"][0])
-                )
+                self.stderr.write(f"Failed to import tweets: {result['messages'][0]}")
diff --git a/ditto/twitter/migrations/0057_alter_account_access_token_and_more.py b/ditto/twitter/migrations/0057_alter_account_access_token_and_more.py
new file mode 100644
index 00000000..7ab998fd
--- /dev/null
+++ b/ditto/twitter/migrations/0057_alter_account_access_token_and_more.py
@@ -0,0 +1,39 @@
+# Generated by Django 4.0.2 on 2022-02-14 10:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("twitter", "0056_add_count_index"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="account",
+            name="access_token",
+            field=models.CharField(
+                blank=True, max_length=255, verbose_name="Access Token"
+            ),
+        ),
+        migrations.AlterField(
+            model_name="account",
+            name="access_token_secret",
+            field=models.CharField(
+                blank=True, max_length=255, verbose_name="Access Token Secret"
+            ),
+        ),
+        migrations.AlterField(
+            model_name="account",
+            name="consumer_key",
+            field=models.CharField(blank=True, max_length=255, verbose_name="API Key"),
+        ),
+        migrations.AlterField(
+            model_name="account",
+            name="consumer_secret",
+            field=models.CharField(
+                blank=True, max_length=255, verbose_name="API Key Secret"
+            ),
+        ),
+    ]
diff --git a/ditto/twitter/models.py b/ditto/twitter/models.py
index 3a9cf2f4..8662c327 100644
--- a/ditto/twitter/models.py
+++ b/ditto/twitter/models.py
@@ -1,4 +1,6 @@
 # coding: utf-8
+import json
+import logging
 import os
 
 try:
@@ -17,7 +19,8 @@
 from .utils import htmlify_description, htmlify_tweet
 from ..core.models import DiffModelMixin, DittoItemModel, TimeStampedModelMixin
 
-import json
+
+logger = logging.getLogger("ditto")
 
 
 class Account(TimeStampedModelMixin, models.Model):
@@ -32,13 +35,17 @@ class Account(TimeStampedModelMixin, models.Model):
         null=False,
         blank=True,
         max_length=255,
-        help_text="(API Key) From https://apps.twitter.com",
+        verbose_name="API Key",
     )
     consumer_secret = models.CharField(
-        null=False, blank=True, max_length=255, help_text="(API Secret)"
+        null=False, blank=True, max_length=255, verbose_name="API Key Secret"
+    )
+    access_token = models.CharField(
+        null=False, blank=True, max_length=255, verbose_name="Access Token"
+    )
+    access_token_secret = models.CharField(
+        null=False, blank=True, max_length=255, verbose_name="Access Token Secret"
     )
-    access_token = models.CharField(null=False, blank=True, max_length=255)
-    access_token_secret = models.CharField(null=False, blank=True, max_length=255)
     last_recent_id = models.BigIntegerField(
         null=True,
         blank=True,
@@ -59,8 +66,24 @@ class Account(TimeStampedModelMixin, models.Model):
 
     def save(self, *args, **kwargs):
         if self.user is None:
-            self.updateUserFromTwitter()
-            # Quietly ignoring errors. Sorry.
+            result = self.updateUserFromTwitter()
+
+            # It would be nice to make this more visible, but not sure how to
+            # given we don't have access to a request at this point.
+            if (
+                type(result) is dict
+                and "success" in result
+                and result["success"] is False
+            ):
+                if "messages" in result:
+                    messages = ", ".join(result["messages"])
+                else:
+                    messages = ""
+                logger.error(
+                    "There was an error while trying to update the User data from "
+                    f"the Twitter API: {messages}"
+                )
+
         super().save(*args, **kwargs)
 
     def __str__(self):
@@ -235,6 +258,14 @@ class Meta:
         verbose_name = "Media item"
         verbose_name_plural = "Media items"
 
+    @property
+    def has_file(self):
+        "Do we have a file saved at all?"
+        if self.image_file.name or self.mp4_file.name:
+            return True
+        else:
+            return False
+
     @property
     def thumbnail_w(self):
         "Because we usually actually want 150, not whatever thumb_w is."
diff --git a/ditto/twitter/templates/twitter/includes/tweet.html b/ditto/twitter/templates/twitter/includes/tweet.html
index c852a510..ac6b68e1 100644
--- a/ditto/twitter/templates/twitter/includes/tweet.html
+++ b/ditto/twitter/templates/twitter/includes/tweet.html
@@ -92,4 +92,3 @@
 
     </div><!-- .media-body -->
 {% endif %}
-
diff --git a/ditto/twitter/utils.py b/ditto/twitter/utils.py
index f8d6956e..8e2eaa11 100644
--- a/ditto/twitter/utils.py
+++ b/ditto/twitter/utils.py
@@ -74,6 +74,21 @@ def htmlify_tweet(json_data):
     if "entities" in json_data and "symbols" not in json_data["entities"]:
         json_data["entities"]["symbols"] = []
 
+    # Some Tweets (eg from a downloaded archive) have strings instead of ints
+    # to define text ranges. ["0", "140"] rather than [0, 140].
+    # We fix those here so that Twython doesn't complain.
+    if "display_text_range" in json_data:
+        json_data["display_text_range"] = [
+            int(n) for n in json_data["display_text_range"]
+        ]
+    if "entities" in json_data:
+        for key, value in json_data["entities"].items():
+            for count, entity in enumerate(value):
+                if "indices" in entity:
+                    json_data["entities"][key][count]["indices"] = [
+                        int(n) for n in entity["indices"]
+                    ]
+
     # This does most of the work for us:
     # https://twython.readthedocs.org/en/latest/usage/special_functions.html#html-for-tweet
     html = Twython.html_for_tweet(
diff --git a/docs/_build/doctrees/development.doctree b/docs/_build/doctrees/development.doctree
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index 675a4b68..bc828730 100644
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diff --git a/docs/_build/doctrees/index.doctree b/docs/_build/doctrees/index.doctree
index 9a785c4a..72b8ff0b 100644
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index 214d293e..579af772 100644
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index ec40b8c6..e52071ea 100644
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diff --git a/docs/_build/doctrees/services/flickr.doctree b/docs/_build/doctrees/services/flickr.doctree
index 58a30382..5d517c5c 100644
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diff --git a/docs/_build/doctrees/services/lastfm.doctree b/docs/_build/doctrees/services/lastfm.doctree
index 322c4b5f..44def2c9 100644
Binary files a/docs/_build/doctrees/services/lastfm.doctree and b/docs/_build/doctrees/services/lastfm.doctree differ
diff --git a/docs/_build/doctrees/services/pinboard.doctree b/docs/_build/doctrees/services/pinboard.doctree
index 348dce46..4d7e2376 100644
Binary files a/docs/_build/doctrees/services/pinboard.doctree and b/docs/_build/doctrees/services/pinboard.doctree differ
diff --git a/docs/_build/doctrees/services/twitter.doctree b/docs/_build/doctrees/services/twitter.doctree
index fea5baad..07588ef9 100644
Binary files a/docs/_build/doctrees/services/twitter.doctree and b/docs/_build/doctrees/services/twitter.doctree differ
diff --git a/docs/_build/html/.buildinfo b/docs/_build/html/.buildinfo
index 85121adb..17913110 100644
--- a/docs/_build/html/.buildinfo
+++ b/docs/_build/html/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: c5926ae45bdf655927e4191d7875151f
+config: 0955893ed4646c1b447dfb8db4a0e530
 tags: 645f666f9bcd5a90fca523b33c5a78b7
diff --git a/docs/_build/html/_sources/development.rst.txt b/docs/_build/html/_sources/development.rst.txt
index bd073734..1310c82c 100644
--- a/docs/_build/html/_sources/development.rst.txt
+++ b/docs/_build/html/_sources/development.rst.txt
@@ -98,7 +98,7 @@ Set version number in ``ditto/__init__.py``.
 
 Rebuild documentation (which includes the version number).
 
-Ensure ``CHANGES.rst`` is up-to-date for new version.
+Ensure ``CHANGELOG.md`` is up-to-date for new version.
 
 Commit changes to git.
 
diff --git a/docs/_build/html/_sources/services/twitter.rst.txt b/docs/_build/html/_sources/services/twitter.rst.txt
index 5b3854ac..7a8dc07e 100644
--- a/docs/_build/html/_sources/services/twitter.rst.txt
+++ b/docs/_build/html/_sources/services/twitter.rst.txt
@@ -8,13 +8,15 @@ You can fetch, store and display data about your own Tweets and Liked Tweets for
 Set-up
 ******
 
-Go to https://apps.twitter.com/ and create a new Application for your Twitter account. You can leave the 'Callback URL' field empty.
+Go to https://developer.twitter.com/portal. You'll need to sign up for a Developer Account, and then create a new App for your Twitter account. Note down the three credentials it says that you should note down.
 
-When viewing the Application Settings, click 'manage keys and access tokens'.
+When viewing your App's details, click the "Edit" button, then the "Keys and tokens" tab.
 
-On the next screen click the 'Create my access token' button.
+In the "Access Token and Secret" section, tap the "Generate" button. Make a note of the Access Token and Access Token Secret.
 
-Now, go to the Django admin, and add a new ``Account`` in the Twitter app. Copy the Consumer Key, Consumer Secret, Access Token and Access Token Secret from Twitter into the Django admin (ignore the other fields), and save the account. A new ``User`` object will be created, reflecting the Twitter user your API credentials are associated with.
+Django Ditto currently uses the v1.1 Twitter API rather than the latest v2. Unfortunately, accessing v1.1 requires that you apply for "Elevated" access before the API calls used will work. You can do that here: https://developer.twitter.com/en/portal/products/elevated You will then need to wait for approval.
+
+Once you have that, go to the Django admin, and add a new ``Account`` in the Twitter app. Copy the API Key, API Key Secret, Access Token and Access Token Secret from your Twitter App into the Django admin (ignore the other fields), and save the account. A new ``User`` object will be created, reflecting the Twitter user your API credentials are associated with. If it's worked your Account should have a title like **@philgyford** instead of a number like **1**.
 
 Once this is done you'll need to import a downloaded archive of Tweets, and/or fetch Tweets from the Twitter API. See :ref:`twitter-management-commands` below.
 
@@ -253,13 +255,21 @@ Management commands
 Import Tweets
 =============
 
-If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at https://twitter.com/settings/account . When you've downloaded it, do:
+If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at https://twitter.com/settings/download_your_data . When you've downloaded it, do:
 
 .. code-block:: shell
 
-    $ ./manage.py import_twitter_tweets --path=/Users/phil/Downloads/12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66
+    $ ./manage.py import_twitter_tweets --path=/path/to/twitter-2022-01-31-123456abcdef
+
+using the correct path to the directory you've downloaded and unzipped (in this case, the unzipped directory is ``twitter-2022-01-031-123456abcdef``). This will import all of the Tweets found in the archive and all of the images and animated GIFs' MP4 files (other videos aren't currently imported).
 
-using the correct path to the directory you've downloaded and unzipped (in this case, the unzipped directory is ``12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66``). This will import all of the Tweets found in the archive.
+**NOTE:** If you have an archive of data you downloaded before sometime in early 2019 it will be a different format. You can tell because the folder will contain five directories, and three files: ``index.html``, ``README.txt``, and ``tweets.csv``. If you want to import an archive in this format add the `--archive-version=v1` argument:
+
+.. code-block:: shell
+
+    $ ./manage.py import_twitter_tweets --archive-version=v1 --path=/path/to/123456_abcdef
+
+using the correct path to the directory (in this case, the unzipped directory is ``123456_abcdef``). This will import Tweet data but no images etc, because these files weren't included in the older archive format.
 
 Update Tweets
 =============
@@ -423,4 +433,3 @@ Fetch Accounts
     $ ./manage.py fetch_twitter_accounts
 
 I don't think this is needed now.
-
diff --git a/docs/_build/html/_static/basic.css b/docs/_build/html/_static/basic.css
index c41d718e..912859b5 100644
--- a/docs/_build/html/_static/basic.css
+++ b/docs/_build/html/_static/basic.css
@@ -4,7 +4,7 @@
  *
  * Sphinx stylesheet -- basic theme.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -15,6 +15,12 @@ div.clearer {
     clear: both;
 }
 
+div.section::after {
+    display: block;
+    content: '';
+    clear: left;
+}
+
 /* -- relbar ---------------------------------------------------------------- */
 
 div.related {
@@ -124,7 +130,7 @@ ul.search li a {
     font-weight: bold;
 }
 
-ul.search li div.context {
+ul.search li p.context {
     color: #888;
     margin: 2px 0 0 30px;
     text-align: left;
@@ -271,25 +277,25 @@ p.rubric {
     font-weight: bold;
 }
 
-img.align-left, .figure.align-left, object.align-left {
+img.align-left, figure.align-left, .figure.align-left, object.align-left {
     clear: left;
     float: left;
     margin-right: 1em;
 }
 
-img.align-right, .figure.align-right, object.align-right {
+img.align-right, figure.align-right, .figure.align-right, object.align-right {
     clear: right;
     float: right;
     margin-left: 1em;
 }
 
-img.align-center, .figure.align-center, object.align-center {
+img.align-center, figure.align-center, .figure.align-center, object.align-center {
   display: block;
   margin-left: auto;
   margin-right: auto;
 }
 
-img.align-default, .figure.align-default {
+img.align-default, figure.align-default, .figure.align-default {
   display: block;
   margin-left: auto;
   margin-right: auto;
@@ -313,24 +319,31 @@ img.align-default, .figure.align-default {
 
 /* -- sidebars -------------------------------------------------------------- */
 
-div.sidebar {
+div.sidebar,
+aside.sidebar {
     margin: 0 0 0.5em 1em;
     border: 1px solid #ddb;
-    padding: 7px 7px 0 7px;
+    padding: 7px;
     background-color: #ffe;
     width: 40%;
     float: right;
+    clear: right;
+    overflow-x: auto;
 }
 
 p.sidebar-title {
     font-weight: bold;
 }
 
+div.admonition, div.topic, blockquote {
+    clear: left;
+}
+
 /* -- topics ---------------------------------------------------------------- */
 
 div.topic {
     border: 1px solid #ccc;
-    padding: 7px 7px 0 7px;
+    padding: 7px;
     margin: 10px 0 10px 0;
 }
 
@@ -352,10 +365,6 @@ div.admonition dt {
     font-weight: bold;
 }
 
-div.admonition dl {
-    margin-bottom: 0;
-}
-
 p.admonition-title {
     margin: 0px 10px 5px 0px;
     font-weight: bold;
@@ -366,9 +375,30 @@ div.body p.centered {
     margin-top: 25px;
 }
 
+/* -- content of sidebars/topics/admonitions -------------------------------- */
+
+div.sidebar > :last-child,
+aside.sidebar > :last-child,
+div.topic > :last-child,
+div.admonition > :last-child {
+    margin-bottom: 0;
+}
+
+div.sidebar::after,
+aside.sidebar::after,
+div.topic::after,
+div.admonition::after,
+blockquote::after {
+    display: block;
+    content: '';
+    clear: both;
+}
+
 /* -- tables ---------------------------------------------------------------- */
 
 table.docutils {
+    margin-top: 10px;
+    margin-bottom: 10px;
     border: 0;
     border-collapse: collapse;
 }
@@ -416,32 +446,34 @@ table.citation td {
     border-bottom: none;
 }
 
-th > p:first-child,
-td > p:first-child {
+th > :first-child,
+td > :first-child {
     margin-top: 0px;
 }
 
-th > p:last-child,
-td > p:last-child {
+th > :last-child,
+td > :last-child {
     margin-bottom: 0px;
 }
 
 /* -- figures --------------------------------------------------------------- */
 
-div.figure {
+div.figure, figure {
     margin: 0.5em;
     padding: 0.5em;
 }
 
-div.figure p.caption {
+div.figure p.caption, figcaption {
     padding: 0.3em;
 }
 
-div.figure p.caption span.caption-number {
+div.figure p.caption span.caption-number,
+figcaption span.caption-number {
     font-style: italic;
 }
 
-div.figure p.caption span.caption-text {
+div.figure p.caption span.caption-text,
+figcaption span.caption-text {
 }
 
 /* -- field list styles ----------------------------------------------------- */
@@ -468,10 +500,71 @@ table.field-list td, table.field-list th {
 
 /* -- hlist styles ---------------------------------------------------------- */
 
+table.hlist {
+    margin: 1em 0;
+}
+
 table.hlist td {
     vertical-align: top;
 }
 
+/* -- object description styles --------------------------------------------- */
+
+.sig {
+	font-family: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
+}
+
+.sig-name, code.descname {
+    background-color: transparent;
+    font-weight: bold;
+}
+
+.sig-name {
+	font-size: 1.1em;
+}
+
+code.descname {
+    font-size: 1.2em;
+}
+
+.sig-prename, code.descclassname {
+    background-color: transparent;
+}
+
+.optional {
+    font-size: 1.3em;
+}
+
+.sig-paren {
+    font-size: larger;
+}
+
+.sig-param.n {
+	font-style: italic;
+}
+
+/* C++ specific styling */
+
+.sig-inline.c-texpr,
+.sig-inline.cpp-texpr {
+	font-family: unset;
+}
+
+.sig.c   .k, .sig.c   .kt,
+.sig.cpp .k, .sig.cpp .kt {
+	color: #0033B3;
+}
+
+.sig.c   .m,
+.sig.cpp .m {
+	color: #1750EB;
+}
+
+.sig.c   .s, .sig.c   .sc,
+.sig.cpp .s, .sig.cpp .sc {
+	color: #067D17;
+}
+
 
 /* -- other body styles ----------------------------------------------------- */
 
@@ -495,17 +588,37 @@ ol.upperroman {
     list-style: upper-roman;
 }
 
-li > p:first-child {
+:not(li) > ol > li:first-child > :first-child,
+:not(li) > ul > li:first-child > :first-child {
     margin-top: 0px;
 }
 
-li > p:last-child {
+:not(li) > ol > li:last-child > :last-child,
+:not(li) > ul > li:last-child > :last-child {
     margin-bottom: 0px;
 }
 
+ol.simple ol p,
+ol.simple ul p,
+ul.simple ol p,
+ul.simple ul p {
+    margin-top: 0;
+}
+
+ol.simple > li:not(:first-child) > p,
+ul.simple > li:not(:first-child) > p {
+    margin-top: 0;
+}
+
+ol.simple p,
+ul.simple p {
+    margin-bottom: 0;
+}
+
 dl.footnote > dt,
 dl.citation > dt {
     float: left;
+    margin-right: 0.5em;
 }
 
 dl.footnote > dd,
@@ -520,14 +633,15 @@ dl.citation > dd:after {
 }
 
 dl.field-list {
-    display: flex;
-    flex-wrap: wrap;
+    display: grid;
+    grid-template-columns: fit-content(30%) auto;
 }
 
 dl.field-list > dt {
-    flex-basis: 20%;
     font-weight: bold;
     word-break: break-word;
+    padding-left: 0.5em;
+    padding-right: 5px;
 }
 
 dl.field-list > dt:after {
@@ -535,8 +649,8 @@ dl.field-list > dt:after {
 }
 
 dl.field-list > dd {
-    flex-basis: 70%;
-    padding-left: 1em;
+    padding-left: 0.5em;
+    margin-top: 0em;
     margin-left: 0em;
     margin-bottom: 0em;
 }
@@ -545,7 +659,7 @@ dl {
     margin-bottom: 15px;
 }
 
-dd > p:first-child {
+dd > :first-child {
     margin-top: 0px;
 }
 
@@ -559,6 +673,11 @@ dd {
     margin-left: 30px;
 }
 
+dl > dd:last-child,
+dl > dd:last-child > :last-child {
+    margin-bottom: 0;
+}
+
 dt:target, span.highlighted {
     background-color: #fbe54e;
 }
@@ -572,14 +691,6 @@ dl.glossary dt {
     font-size: 1.1em;
 }
 
-.optional {
-    font-size: 1.3em;
-}
-
-.sig-paren {
-    font-size: larger;
-}
-
 .versionmodified {
     font-style: italic;
 }
@@ -636,6 +747,10 @@ pre {
     overflow-y: hidden;  /* fixes display issues on Chrome browsers */
 }
 
+pre, div[class*="highlight-"] {
+    clear: both;
+}
+
 span.pre {
     -moz-hyphens: none;
     -ms-hyphens: none;
@@ -643,22 +758,57 @@ span.pre {
     hyphens: none;
 }
 
+div[class*="highlight-"] {
+    margin: 1em 0;
+}
+
 td.linenos pre {
-    padding: 5px 0px;
     border: 0;
     background-color: transparent;
     color: #aaa;
 }
 
 table.highlighttable {
-    margin-left: 0.5em;
+    display: block;
+}
+
+table.highlighttable tbody {
+    display: block;
+}
+
+table.highlighttable tr {
+    display: flex;
 }
 
 table.highlighttable td {
-    padding: 0 0.5em 0 0.5em;
+    margin: 0;
+    padding: 0;
+}
+
+table.highlighttable td.linenos {
+    padding-right: 0.5em;
+}
+
+table.highlighttable td.code {
+    flex: 1;
+    overflow: hidden;
+}
+
+.highlight .hll {
+    display: block;
+}
+
+div.highlight pre,
+table.highlighttable pre {
+    margin: 0;
+}
+
+div.code-block-caption + div {
+    margin-top: 0;
 }
 
 div.code-block-caption {
+    margin-top: 1em;
     padding: 2px 5px;
     font-size: small;
 }
@@ -667,8 +817,14 @@ div.code-block-caption code {
     background-color: transparent;
 }
 
-div.code-block-caption + div > div.highlight > pre {
-    margin-top: 0;
+table.highlighttable td.linenos,
+span.linenos,
+div.highlight span.gp {  /* gp: Generic.Prompt */
+  user-select: none;
+  -webkit-user-select: text; /* Safari fallback only */
+  -webkit-user-select: none; /* Chrome/Safari */
+  -moz-user-select: none; /* Firefox */
+  -ms-user-select: none; /* IE10+ */
 }
 
 div.code-block-caption span.caption-number {
@@ -680,21 +836,7 @@ div.code-block-caption span.caption-text {
 }
 
 div.literal-block-wrapper {
-    padding: 1em 1em 0;
-}
-
-div.literal-block-wrapper div.highlight {
-    margin: 0;
-}
-
-code.descname {
-    background-color: transparent;
-    font-weight: bold;
-    font-size: 1.2em;
-}
-
-code.descclassname {
-    background-color: transparent;
+    margin: 1em 0;
 }
 
 code.xref, a code {
@@ -735,8 +877,7 @@ span.eqno {
 }
 
 span.eqno a.headerlink {
-    position: relative;
-    left: 0px;
+    position: absolute;
     z-index: 1;
 }
 
diff --git a/docs/_build/html/_static/css/badge_only.css b/docs/_build/html/_static/css/badge_only.css
index 3c33cef5..e380325b 100644
--- a/docs/_build/html/_static/css/badge_only.css
+++ b/docs/_build/html/_static/css/badge_only.css
@@ -1 +1 @@
-.fa:before{-webkit-font-smoothing:antialiased}.clearfix{*zoom:1}.clearfix:before,.clearfix:after{display:table;content:""}.clearfix:after{clear:both}@font-face{font-family:FontAwesome;font-weight:normal;font-style:normal;src:url("../fonts/fontawesome-webfont.eot");src:url("../fonts/fontawesome-webfont.eot?#iefix") format("embedded-opentype"),url("../fonts/fontawesome-webfont.woff") format("woff"),url("../fonts/fontawesome-webfont.ttf") format("truetype"),url("../fonts/fontawesome-webfont.svg#FontAwesome") format("svg")}.fa:before{display:inline-block;font-family:FontAwesome;font-style:normal;font-weight:normal;line-height:1;text-decoration:inherit}a .fa{display:inline-block;text-decoration:inherit}li .fa{display:inline-block}li .fa-large:before,li .fa-large:before{width:1.875em}ul.fas{list-style-type:none;margin-left:2em;text-indent:-0.8em}ul.fas li .fa{width:.8em}ul.fas li .fa-large:before,ul.fas li .fa-large:before{vertical-align:baseline}.fa-book:before{content:""}.icon-book:before{content:""}.fa-caret-down:before{content:""}.icon-caret-down:before{content:""}.fa-caret-up:before{content:""}.icon-caret-up:before{content:""}.fa-caret-left:before{content:""}.icon-caret-left:before{content:""}.fa-caret-right:before{content:""}.icon-caret-right:before{content:""}.rst-versions{position:fixed;bottom:0;left:0;width:300px;color:#fcfcfc;background:#1f1d1d;font-family:"Lato","proxima-nova","Helvetica Neue",Arial,sans-serif;z-index:400}.rst-versions a{color:#2980B9;text-decoration:none}.rst-versions .rst-badge-small{display:none}.rst-versions .rst-current-version{padding:12px;background-color:#272525;display:block;text-align:right;font-size:90%;cursor:pointer;color:#27AE60;*zoom:1}.rst-versions .rst-current-version:before,.rst-versions .rst-current-version:after{display:table;content:""}.rst-versions .rst-current-version:after{clear:both}.rst-versions .rst-current-version .fa{color:#fcfcfc}.rst-versions .rst-current-version .fa-book{float:left}.rst-versions .rst-current-version .icon-book{float:left}.rst-versions .rst-current-version.rst-out-of-date{background-color:#E74C3C;color:#fff}.rst-versions .rst-current-version.rst-active-old-version{background-color:#F1C40F;color:#000}.rst-versions.shift-up{height:auto;max-height:100%;overflow-y:scroll}.rst-versions.shift-up .rst-other-versions{display:block}.rst-versions .rst-other-versions{font-size:90%;padding:12px;color:gray;display:none}.rst-versions .rst-other-versions hr{display:block;height:1px;border:0;margin:20px 0;padding:0;border-top:solid 1px #413d3d}.rst-versions .rst-other-versions dd{display:inline-block;margin:0}.rst-versions .rst-other-versions dd a{display:inline-block;padding:6px;color:#fcfcfc}.rst-versions.rst-badge{width:auto;bottom:20px;right:20px;left:auto;border:none;max-width:300px;max-height:90%}.rst-versions.rst-badge .icon-book{float:none}.rst-versions.rst-badge .fa-book{float:none}.rst-versions.rst-badge.shift-up .rst-current-version{text-align:right}.rst-versions.rst-badge.shift-up .rst-current-version .fa-book{float:left}.rst-versions.rst-badge.shift-up .rst-current-version .icon-book{float:left}.rst-versions.rst-badge .rst-current-version{width:auto;height:30px;line-height:30px;padding:0 6px;display:block;text-align:center}@media screen and (max-width: 768px){.rst-versions{width:85%;display:none}.rst-versions.shift{display:block}}
+.fa:before{-webkit-font-smoothing:antialiased}.clearfix{*zoom:1}.clearfix:after,.clearfix:before{display:table;content:""}.clearfix:after{clear:both}@font-face{font-family:FontAwesome;font-style:normal;font-weight:400;src:url(fonts/fontawesome-webfont.eot?674f50d287a8c48dc19ba404d20fe713?#iefix) format("embedded-opentype"),url(fonts/fontawesome-webfont.woff2?af7ae505a9eed503f8b8e6982036873e) format("woff2"),url(fonts/fontawesome-webfont.woff?fee66e712a8a08eef5805a46892932ad) format("woff"),url(fonts/fontawesome-webfont.ttf?b06871f281fee6b241d60582ae9369b9) format("truetype"),url(fonts/fontawesome-webfont.svg?912ec66d7572ff821749319396470bde#FontAwesome) format("svg")}.fa:before{font-family:FontAwesome;font-style:normal;font-weight:400;line-height:1}.fa:before,a .fa{text-decoration:inherit}.fa:before,a .fa,li .fa{display:inline-block}li .fa-large:before{width:1.875em}ul.fas{list-style-type:none;margin-left:2em;text-indent:-.8em}ul.fas li .fa{width:.8em}ul.fas li .fa-large:before{vertical-align:baseline}.fa-book:before,.icon-book:before{content:"\f02d"}.fa-caret-down:before,.icon-caret-down:before{content:"\f0d7"}.fa-caret-up:before,.icon-caret-up:before{content:"\f0d8"}.fa-caret-left:before,.icon-caret-left:before{content:"\f0d9"}.fa-caret-right:before,.icon-caret-right:before{content:"\f0da"}.rst-versions{position:fixed;bottom:0;left:0;width:300px;color:#fcfcfc;background:#1f1d1d;font-family:Lato,proxima-nova,Helvetica Neue,Arial,sans-serif;z-index:400}.rst-versions a{color:#2980b9;text-decoration:none}.rst-versions .rst-badge-small{display:none}.rst-versions .rst-current-version{padding:12px;background-color:#272525;display:block;text-align:right;font-size:90%;cursor:pointer;color:#27ae60}.rst-versions .rst-current-version:after{clear:both;content:"";display:block}.rst-versions .rst-current-version .fa{color:#fcfcfc}.rst-versions .rst-current-version .fa-book,.rst-versions .rst-current-version .icon-book{float:left}.rst-versions .rst-current-version.rst-out-of-date{background-color:#e74c3c;color:#fff}.rst-versions .rst-current-version.rst-active-old-version{background-color:#f1c40f;color:#000}.rst-versions.shift-up{height:auto;max-height:100%;overflow-y:scroll}.rst-versions.shift-up .rst-other-versions{display:block}.rst-versions .rst-other-versions{font-size:90%;padding:12px;color:grey;display:none}.rst-versions .rst-other-versions hr{display:block;height:1px;border:0;margin:20px 0;padding:0;border-top:1px solid #413d3d}.rst-versions .rst-other-versions dd{display:inline-block;margin:0}.rst-versions .rst-other-versions dd a{display:inline-block;padding:6px;color:#fcfcfc}.rst-versions.rst-badge{width:auto;bottom:20px;right:20px;left:auto;border:none;max-width:300px;max-height:90%}.rst-versions.rst-badge .fa-book,.rst-versions.rst-badge .icon-book{float:none;line-height:30px}.rst-versions.rst-badge.shift-up .rst-current-version{text-align:right}.rst-versions.rst-badge.shift-up .rst-current-version .fa-book,.rst-versions.rst-badge.shift-up .rst-current-version .icon-book{float:left}.rst-versions.rst-badge>.rst-current-version{width:auto;height:30px;line-height:30px;padding:0 6px;display:block;text-align:center}@media screen and (max-width:768px){.rst-versions{width:85%;display:none}.rst-versions.shift{display:block}}
\ No newline at end of file
diff --git a/docs/_build/html/_static/css/theme.css b/docs/_build/html/_static/css/theme.css
index aed8cef0..0d9ae7e1 100644
--- a/docs/_build/html/_static/css/theme.css
+++ b/docs/_build/html/_static/css/theme.css
@@ -1,6 +1,4 @@
-/* sphinx_rtd_theme version 0.4.3 | MIT license */
-/* Built 20190212 16:02 */
-*{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}audio,canvas,video{display:inline-block;*display:inline;*zoom:1}audio:not([controls]){display:none}[hidden]{display:none}*{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}body{margin:0}a:hover,a:active{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:bold}blockquote{margin:0}dfn{font-style:italic}ins{background:#ff9;color:#000;text-decoration:none}mark{background:#ff0;color:#000;font-style:italic;font-weight:bold}pre,code,.rst-content tt,.rst-content code,kbd,samp{font-family:monospace,serif;_font-family:"courier 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\ No newline at end of file
diff --git a/docs/_build/html/_static/doctools.js b/docs/_build/html/_static/doctools.js
index b33f87fc..8cbf1b16 100644
--- a/docs/_build/html/_static/doctools.js
+++ b/docs/_build/html/_static/doctools.js
@@ -4,7 +4,7 @@
  *
  * Sphinx JavaScript utilities for all documentation.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -29,9 +29,14 @@ if (!window.console || !console.firebug) {
 
 /**
  * small helper function to urldecode strings
+ *
+ * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent#Decoding_query_parameters_from_a_URL
  */
 jQuery.urldecode = function(x) {
-  return decodeURIComponent(x).replace(/\+/g, ' ');
+  if (!x) {
+    return x
+  }
+  return decodeURIComponent(x.replace(/\+/g, ' '));
 };
 
 /**
@@ -283,10 +288,12 @@ var Documentation = {
   },
 
   initOnKeyListeners: function() {
-    $(document).keyup(function(event) {
+    $(document).keydown(function(event) {
       var activeElementType = document.activeElement.tagName;
-      // don't navigate when in search box or textarea
-      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT') {
+      // don't navigate when in search box, textarea, dropdown or button
+      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT'
+          && activeElementType !== 'BUTTON' && !event.altKey && !event.ctrlKey && !event.metaKey
+          && !event.shiftKey) {
         switch (event.keyCode) {
           case 37: // left
             var prevHref = $('link[rel="prev"]').prop('href');
@@ -294,12 +301,14 @@ var Documentation = {
               window.location.href = prevHref;
               return false;
             }
+            break;
           case 39: // right
             var nextHref = $('link[rel="next"]').prop('href');
             if (nextHref) {
               window.location.href = nextHref;
               return false;
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diff --git a/docs/_build/html/_static/documentation_options.js b/docs/_build/html/_static/documentation_options.js
index 8ad595c7..5a94801b 100644
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+    VERSION: '2.0.0',
     LANGUAGE: 'None',
     COLLAPSE_INDEX: false,
+    BUILDER: 'html',
     FILE_SUFFIX: '.html',
+    LINK_SUFFIX: '.html',
     HAS_SOURCE: true,
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diff --git a/docs/_build/html/_static/jquery.js b/docs/_build/html/_static/jquery.js
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diff --git a/docs/_build/html/_static/language_data.js b/docs/_build/html/_static/language_data.js
index 5266fb19..863704b3 100644
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  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
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  */
@@ -13,7 +13,8 @@
 var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"];
 
 
-/* Non-minified version JS is _stemmer.js if file is provided */ 
+/* Non-minified version is copied as a separate JS file, is available */
+
 /**
  * Porter Stemmer
  */
@@ -199,7 +200,6 @@ var Stemmer = function() {
 
 
 
-
 var splitChars = (function() {
     var result = {};
     var singles = [96, 180, 187, 191, 215, 247, 749, 885, 903, 907, 909, 930, 1014, 1648,
diff --git a/docs/_build/html/_static/pygments.css b/docs/_build/html/_static/pygments.css
index 20c4814d..691aeb82 100644
--- a/docs/_build/html/_static/pygments.css
+++ b/docs/_build/html/_static/pygments.css
@@ -1,5 +1,10 @@
+pre { line-height: 125%; }
+td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
+span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
 .highlight .hll { background-color: #ffffcc }
-.highlight  { background: #eeffcc; }
+.highlight { background: #eeffcc; }
 .highlight .c { color: #408090; font-style: italic } /* Comment */
 .highlight .err { border: 1px solid #FF0000 } /* Error */
 .highlight .k { color: #007020; font-weight: bold } /* Keyword */
diff --git a/docs/_build/html/_static/searchtools.js b/docs/_build/html/_static/searchtools.js
index 6031f991..58ff35c4 100644
--- a/docs/_build/html/_static/searchtools.js
+++ b/docs/_build/html/_static/searchtools.js
@@ -4,7 +4,7 @@
  *
  * Sphinx JavaScript utilities for the full-text search.
  *
- * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
  * :license: BSD, see LICENSE for details.
  *
  */
@@ -59,10 +59,15 @@ var Search = {
   _pulse_status : -1,
 
   htmlToText : function(htmlString) {
-      var htmlElement = document.createElement('span');
-      htmlElement.innerHTML = htmlString;
-      $(htmlElement).find('.headerlink').remove();
-      docContent = $(htmlElement).find('[role=main]')[0];
+      var virtualDocument = document.implementation.createHTMLDocument('virtual');
+      var htmlElement = $(htmlString, virtualDocument);
+      htmlElement.find('.headerlink').remove();
+      docContent = htmlElement.find('[role=main]')[0];
+      if(docContent === undefined) {
+          console.warn("Content block not found. Sphinx search tries to obtain it " +
+                       "via '[role=main]'. Could you check your theme or template.");
+          return "";
+      }
       return docContent.textContent || docContent.innerText;
   },
 
@@ -161,8 +166,7 @@ var Search = {
           objectterms.push(tmp[i].toLowerCase());
       }
 
-      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
-          tmp[i] === "") {
+      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i] === "") {
         // skip this "word"
         continue;
       }
@@ -244,8 +248,10 @@ var Search = {
       // results left, load the summary and display it
       if (results.length) {
         var item = results.pop();
-        var listItem = $('<li style="display:none"></li>');
-        if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
+        var listItem = $('<li></li>');
+        var requestUrl = "";
+        var linkUrl = "";
+        if (DOCUMENTATION_OPTIONS.BUILDER === 'dirhtml') {
           // dirhtml builder
           var dirname = item[0] + '/';
           if (dirname.match(/\/index\/$/)) {
@@ -253,40 +259,45 @@ var Search = {
           } else if (dirname == 'index/') {
             dirname = '';
           }
-          listItem.append($('<a/>').attr('href',
-            DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
-            highlightstring + item[2]).html(item[1]));
+          requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + dirname;
+          linkUrl = requestUrl;
+
         } else {
           // normal html builders
-          listItem.append($('<a/>').attr('href',
-            item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
-            highlightstring + item[2]).html(item[1]));
+          requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX;
+          linkUrl = item[0] + DOCUMENTATION_OPTIONS.LINK_SUFFIX;
         }
+        listItem.append($('<a/>').attr('href',
+            linkUrl +
+            highlightstring + item[2]).html(item[1]));
         if (item[3]) {
           listItem.append($('<span> (' + item[3] + ')</span>'));
           Search.output.append(listItem);
-          listItem.slideDown(5, function() {
+          setTimeout(function() {
             displayNextItem();
-          });
+          }, 5);
         } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
-          $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX,
+          $.ajax({url: requestUrl,
                   dataType: "text",
                   complete: function(jqxhr, textstatus) {
                     var data = jqxhr.responseText;
                     if (data !== '' && data !== undefined) {
-                      listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
+                      var summary = Search.makeSearchSummary(data, searchterms, hlterms);
+                      if (summary) {
+                        listItem.append(summary);
+                      }
                     }
                     Search.output.append(listItem);
-                    listItem.slideDown(5, function() {
+                    setTimeout(function() {
                       displayNextItem();
-                    });
+                    }, 5);
                   }});
         } else {
           // no source available, just display title
           Search.output.append(listItem);
-          listItem.slideDown(5, function() {
+          setTimeout(function() {
             displayNextItem();
-          });
+          }, 5);
         }
       }
       // search finished, update title and status message
@@ -371,6 +382,13 @@ var Search = {
     return results;
   },
 
+  /**
+   * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+   */
+  escapeRegExp : function(string) {
+    return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
+  },
+
   /**
    * search for full-text terms in the index
    */
@@ -394,13 +412,14 @@ var Search = {
       ];
       // add support for partial matches
       if (word.length > 2) {
+        var word_regex = this.escapeRegExp(word);
         for (var w in terms) {
-          if (w.match(word) && !terms[word]) {
+          if (w.match(word_regex) && !terms[word]) {
             _o.push({files: terms[w], score: Scorer.partialTerm})
           }
         }
         for (var w in titleterms) {
-          if (w.match(word) && !titleterms[word]) {
+          if (w.match(word_regex) && !titleterms[word]) {
               _o.push({files: titleterms[w], score: Scorer.partialTitle})
           }
         }
@@ -424,7 +443,7 @@ var Search = {
         for (j = 0; j < _files.length; j++) {
           file = _files[j];
           if (!(file in scoreMap))
-            scoreMap[file] = {}
+            scoreMap[file] = {};
           scoreMap[file][word] = o.score;
         }
       });
@@ -432,7 +451,7 @@ var Search = {
       // create the mapping
       for (j = 0; j < files.length; j++) {
         file = files[j];
-        if (file in fileMap)
+        if (file in fileMap && fileMap[file].indexOf(word) === -1)
           fileMap[file].push(word);
         else
           fileMap[file] = [word];
@@ -482,6 +501,9 @@ var Search = {
    */
   makeSearchSummary : function(htmlText, keywords, hlwords) {
     var text = Search.htmlToText(htmlText);
+    if (text == "") {
+      return null;
+    }
     var textLower = text.toLowerCase();
     var start = 0;
     $.each(keywords, function() {
@@ -493,7 +515,7 @@ var Search = {
     var excerpt = ((start > 0) ? '...' : '') +
       $.trim(text.substr(start, 240)) +
       ((start + 240 - text.length) ? '...' : '');
-    var rv = $('<div class="context"></div>').text(excerpt);
+    var rv = $('<p class="context"></p>').text(excerpt);
     $.each(hlwords, function() {
       rv = rv.highlightText(this, 'highlighted');
     });
diff --git a/docs/_build/html/_static/underscore-1.13.1.js b/docs/_build/html/_static/underscore-1.13.1.js
new file mode 100644
index 00000000..ffd77af9
--- /dev/null
+++ b/docs/_build/html/_static/underscore-1.13.1.js
@@ -0,0 +1,2042 @@
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define('underscore', factory) :
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, (function () {
+    var current = global._;
+    var exports = global._ = factory();
+    exports.noConflict = function () { global._ = current; return exports; };
+  }()));
+}(this, (function () {
+  //     Underscore.js 1.13.1
+  //     https://underscorejs.org
+  //     (c) 2009-2021 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors
+  //     Underscore may be freely distributed under the MIT license.
+
+  // Current version.
+  var VERSION = '1.13.1';
+
+  // Establish the root object, `window` (`self`) in the browser, `global`
+  // on the server, or `this` in some virtual machines. We use `self`
+  // instead of `window` for `WebWorker` support.
+  var root = typeof self == 'object' && self.self === self && self ||
+            typeof global == 'object' && global.global === global && global ||
+            Function('return this')() ||
+            {};
+
+  // Save bytes in the minified (but not gzipped) version:
+  var ArrayProto = Array.prototype, ObjProto = Object.prototype;
+  var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;
+
+  // Create quick reference variables for speed access to core prototypes.
+  var push = ArrayProto.push,
+      slice = ArrayProto.slice,
+      toString = ObjProto.toString,
+      hasOwnProperty = ObjProto.hasOwnProperty;
+
+  // Modern feature detection.
+  var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined',
+      supportsDataView = typeof DataView !== 'undefined';
+
+  // All **ECMAScript 5+** native function implementations that we hope to use
+  // are declared here.
+  var nativeIsArray = Array.isArray,
+      nativeKeys = Object.keys,
+      nativeCreate = Object.create,
+      nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;
+
+  // Create references to these builtin functions because we override them.
+  var _isNaN = isNaN,
+      _isFinite = isFinite;
+
+  // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
+  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
+  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
+    'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
+
+  // The largest integer that can be represented exactly.
+  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
+
+  // Some functions take a variable number of arguments, or a few expected
+  // arguments at the beginning and then a variable number of values to operate
+  // on. This helper accumulates all remaining arguments past the function’s
+  // argument length (or an explicit `startIndex`), into an array that becomes
+  // the last argument. Similar to ES6’s "rest parameter".
+  function restArguments(func, startIndex) {
+    startIndex = startIndex == null ? func.length - 1 : +startIndex;
+    return function() {
+      var length = Math.max(arguments.length - startIndex, 0),
+          rest = Array(length),
+          index = 0;
+      for (; index < length; index++) {
+        rest[index] = arguments[index + startIndex];
+      }
+      switch (startIndex) {
+        case 0: return func.call(this, rest);
+        case 1: return func.call(this, arguments[0], rest);
+        case 2: return func.call(this, arguments[0], arguments[1], rest);
+      }
+      var args = Array(startIndex + 1);
+      for (index = 0; index < startIndex; index++) {
+        args[index] = arguments[index];
+      }
+      args[startIndex] = rest;
+      return func.apply(this, args);
+    };
+  }
+
+  // Is a given variable an object?
+  function isObject(obj) {
+    var type = typeof obj;
+    return type === 'function' || type === 'object' && !!obj;
+  }
+
+  // Is a given value equal to null?
+  function isNull(obj) {
+    return obj === null;
+  }
+
+  // Is a given variable undefined?
+  function isUndefined(obj) {
+    return obj === void 0;
+  }
+
+  // Is a given value a boolean?
+  function isBoolean(obj) {
+    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
+  }
+
+  // Is a given value a DOM element?
+  function isElement(obj) {
+    return !!(obj && obj.nodeType === 1);
+  }
+
+  // Internal function for creating a `toString`-based type tester.
+  function tagTester(name) {
+    var tag = '[object ' + name + ']';
+    return function(obj) {
+      return toString.call(obj) === tag;
+    };
+  }
+
+  var isString = tagTester('String');
+
+  var isNumber = tagTester('Number');
+
+  var isDate = tagTester('Date');
+
+  var isRegExp = tagTester('RegExp');
+
+  var isError = tagTester('Error');
+
+  var isSymbol = tagTester('Symbol');
+
+  var isArrayBuffer = tagTester('ArrayBuffer');
+
+  var isFunction = tagTester('Function');
+
+  // Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old
+  // v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
+  var nodelist = root.document && root.document.childNodes;
+  if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
+    isFunction = function(obj) {
+      return typeof obj == 'function' || false;
+    };
+  }
+
+  var isFunction$1 = isFunction;
+
+  var hasObjectTag = tagTester('Object');
+
+  // In IE 10 - Edge 13, `DataView` has string tag `'[object Object]'`.
+  // In IE 11, the most common among them, this problem also applies to
+  // `Map`, `WeakMap` and `Set`.
+  var hasStringTagBug = (
+        supportsDataView && hasObjectTag(new DataView(new ArrayBuffer(8)))
+      ),
+      isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map));
+
+  var isDataView = tagTester('DataView');
+
+  // In IE 10 - Edge 13, we need a different heuristic
+  // to determine whether an object is a `DataView`.
+  function ie10IsDataView(obj) {
+    return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer);
+  }
+
+  var isDataView$1 = (hasStringTagBug ? ie10IsDataView : isDataView);
+
+  // Is a given value an array?
+  // Delegates to ECMA5's native `Array.isArray`.
+  var isArray = nativeIsArray || tagTester('Array');
+
+  // Internal function to check whether `key` is an own property name of `obj`.
+  function has$1(obj, key) {
+    return obj != null && hasOwnProperty.call(obj, key);
+  }
+
+  var isArguments = tagTester('Arguments');
+
+  // Define a fallback version of the method in browsers (ahem, IE < 9), where
+  // there isn't any inspectable "Arguments" type.
+  (function() {
+    if (!isArguments(arguments)) {
+      isArguments = function(obj) {
+        return has$1(obj, 'callee');
+      };
+    }
+  }());
+
+  var isArguments$1 = isArguments;
+
+  // Is a given object a finite number?
+  function isFinite$1(obj) {
+    return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj));
+  }
+
+  // Is the given value `NaN`?
+  function isNaN$1(obj) {
+    return isNumber(obj) && _isNaN(obj);
+  }
+
+  // Predicate-generating function. Often useful outside of Underscore.
+  function constant(value) {
+    return function() {
+      return value;
+    };
+  }
+
+  // Common internal logic for `isArrayLike` and `isBufferLike`.
+  function createSizePropertyCheck(getSizeProperty) {
+    return function(collection) {
+      var sizeProperty = getSizeProperty(collection);
+      return typeof sizeProperty == 'number' && sizeProperty >= 0 && sizeProperty <= MAX_ARRAY_INDEX;
+    }
+  }
+
+  // Internal helper to generate a function to obtain property `key` from `obj`.
+  function shallowProperty(key) {
+    return function(obj) {
+      return obj == null ? void 0 : obj[key];
+    };
+  }
+
+  // Internal helper to obtain the `byteLength` property of an object.
+  var getByteLength = shallowProperty('byteLength');
+
+  // Internal helper to determine whether we should spend extensive checks against
+  // `ArrayBuffer` et al.
+  var isBufferLike = createSizePropertyCheck(getByteLength);
+
+  // Is a given value a typed array?
+  var typedArrayPattern = /\[object ((I|Ui)nt(8|16|32)|Float(32|64)|Uint8Clamped|Big(I|Ui)nt64)Array\]/;
+  function isTypedArray(obj) {
+    // `ArrayBuffer.isView` is the most future-proof, so use it when available.
+    // Otherwise, fall back on the above regular expression.
+    return nativeIsView ? (nativeIsView(obj) && !isDataView$1(obj)) :
+                  isBufferLike(obj) && typedArrayPattern.test(toString.call(obj));
+  }
+
+  var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false);
+
+  // Internal helper to obtain the `length` property of an object.
+  var getLength = shallowProperty('length');
+
+  // Internal helper to create a simple lookup structure.
+  // `collectNonEnumProps` used to depend on `_.contains`, but this led to
+  // circular imports. `emulatedSet` is a one-off solution that only works for
+  // arrays of strings.
+  function emulatedSet(keys) {
+    var hash = {};
+    for (var l = keys.length, i = 0; i < l; ++i) hash[keys[i]] = true;
+    return {
+      contains: function(key) { return hash[key]; },
+      push: function(key) {
+        hash[key] = true;
+        return keys.push(key);
+      }
+    };
+  }
+
+  // Internal helper. Checks `keys` for the presence of keys in IE < 9 that won't
+  // be iterated by `for key in ...` and thus missed. Extends `keys` in place if
+  // needed.
+  function collectNonEnumProps(obj, keys) {
+    keys = emulatedSet(keys);
+    var nonEnumIdx = nonEnumerableProps.length;
+    var constructor = obj.constructor;
+    var proto = isFunction$1(constructor) && constructor.prototype || ObjProto;
+
+    // Constructor is a special case.
+    var prop = 'constructor';
+    if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop);
+
+    while (nonEnumIdx--) {
+      prop = nonEnumerableProps[nonEnumIdx];
+      if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
+        keys.push(prop);
+      }
+    }
+  }
+
+  // Retrieve the names of an object's own properties.
+  // Delegates to **ECMAScript 5**'s native `Object.keys`.
+  function keys(obj) {
+    if (!isObject(obj)) return [];
+    if (nativeKeys) return nativeKeys(obj);
+    var keys = [];
+    for (var key in obj) if (has$1(obj, key)) keys.push(key);
+    // Ahem, IE < 9.
+    if (hasEnumBug) collectNonEnumProps(obj, keys);
+    return keys;
+  }
+
+  // Is a given array, string, or object empty?
+  // An "empty" object has no enumerable own-properties.
+  function isEmpty(obj) {
+    if (obj == null) return true;
+    // Skip the more expensive `toString`-based type checks if `obj` has no
+    // `.length`.
+    var length = getLength(obj);
+    if (typeof length == 'number' && (
+      isArray(obj) || isString(obj) || isArguments$1(obj)
+    )) return length === 0;
+    return getLength(keys(obj)) === 0;
+  }
+
+  // Returns whether an object has a given set of `key:value` pairs.
+  function isMatch(object, attrs) {
+    var _keys = keys(attrs), length = _keys.length;
+    if (object == null) return !length;
+    var obj = Object(object);
+    for (var i = 0; i < length; i++) {
+      var key = _keys[i];
+      if (attrs[key] !== obj[key] || !(key in obj)) return false;
+    }
+    return true;
+  }
+
+  // If Underscore is called as a function, it returns a wrapped object that can
+  // be used OO-style. This wrapper holds altered versions of all functions added
+  // through `_.mixin`. Wrapped objects may be chained.
+  function _$1(obj) {
+    if (obj instanceof _$1) return obj;
+    if (!(this instanceof _$1)) return new _$1(obj);
+    this._wrapped = obj;
+  }
+
+  _$1.VERSION = VERSION;
+
+  // Extracts the result from a wrapped and chained object.
+  _$1.prototype.value = function() {
+    return this._wrapped;
+  };
+
+  // Provide unwrapping proxies for some methods used in engine operations
+  // such as arithmetic and JSON stringification.
+  _$1.prototype.valueOf = _$1.prototype.toJSON = _$1.prototype.value;
+
+  _$1.prototype.toString = function() {
+    return String(this._wrapped);
+  };
+
+  // Internal function to wrap or shallow-copy an ArrayBuffer,
+  // typed array or DataView to a new view, reusing the buffer.
+  function toBufferView(bufferSource) {
+    return new Uint8Array(
+      bufferSource.buffer || bufferSource,
+      bufferSource.byteOffset || 0,
+      getByteLength(bufferSource)
+    );
+  }
+
+  // We use this string twice, so give it a name for minification.
+  var tagDataView = '[object DataView]';
+
+  // Internal recursive comparison function for `_.isEqual`.
+  function eq(a, b, aStack, bStack) {
+    // Identical objects are equal. `0 === -0`, but they aren't identical.
+    // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
+    if (a === b) return a !== 0 || 1 / a === 1 / b;
+    // `null` or `undefined` only equal to itself (strict comparison).
+    if (a == null || b == null) return false;
+    // `NaN`s are equivalent, but non-reflexive.
+    if (a !== a) return b !== b;
+    // Exhaust primitive checks
+    var type = typeof a;
+    if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
+    return deepEq(a, b, aStack, bStack);
+  }
+
+  // Internal recursive comparison function for `_.isEqual`.
+  function deepEq(a, b, aStack, bStack) {
+    // Unwrap any wrapped objects.
+    if (a instanceof _$1) a = a._wrapped;
+    if (b instanceof _$1) b = b._wrapped;
+    // Compare `[[Class]]` names.
+    var className = toString.call(a);
+    if (className !== toString.call(b)) return false;
+    // Work around a bug in IE 10 - Edge 13.
+    if (hasStringTagBug && className == '[object Object]' && isDataView$1(a)) {
+      if (!isDataView$1(b)) return false;
+      className = tagDataView;
+    }
+    switch (className) {
+      // These types are compared by value.
+      case '[object RegExp]':
+        // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
+      case '[object String]':
+        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
+        // equivalent to `new String("5")`.
+        return '' + a === '' + b;
+      case '[object Number]':
+        // `NaN`s are equivalent, but non-reflexive.
+        // Object(NaN) is equivalent to NaN.
+        if (+a !== +a) return +b !== +b;
+        // An `egal` comparison is performed for other numeric values.
+        return +a === 0 ? 1 / +a === 1 / b : +a === +b;
+      case '[object Date]':
+      case '[object Boolean]':
+        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
+        // millisecond representations. Note that invalid dates with millisecond representations
+        // of `NaN` are not equivalent.
+        return +a === +b;
+      case '[object Symbol]':
+        return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
+      case '[object ArrayBuffer]':
+      case tagDataView:
+        // Coerce to typed array so we can fall through.
+        return deepEq(toBufferView(a), toBufferView(b), aStack, bStack);
+    }
+
+    var areArrays = className === '[object Array]';
+    if (!areArrays && isTypedArray$1(a)) {
+        var byteLength = getByteLength(a);
+        if (byteLength !== getByteLength(b)) return false;
+        if (a.buffer === b.buffer && a.byteOffset === b.byteOffset) return true;
+        areArrays = true;
+    }
+    if (!areArrays) {
+      if (typeof a != 'object' || typeof b != 'object') return false;
+
+      // Objects with different constructors are not equivalent, but `Object`s or `Array`s
+      // from different frames are.
+      var aCtor = a.constructor, bCtor = b.constructor;
+      if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor &&
+                               isFunction$1(bCtor) && bCtor instanceof bCtor)
+                          && ('constructor' in a && 'constructor' in b)) {
+        return false;
+      }
+    }
+    // Assume equality for cyclic structures. The algorithm for detecting cyclic
+    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+
+    // Initializing stack of traversed objects.
+    // It's done here since we only need them for objects and arrays comparison.
+    aStack = aStack || [];
+    bStack = bStack || [];
+    var length = aStack.length;
+    while (length--) {
+      // Linear search. Performance is inversely proportional to the number of
+      // unique nested structures.
+      if (aStack[length] === a) return bStack[length] === b;
+    }
+
+    // Add the first object to the stack of traversed objects.
+    aStack.push(a);
+    bStack.push(b);
+
+    // Recursively compare objects and arrays.
+    if (areArrays) {
+      // Compare array lengths to determine if a deep comparison is necessary.
+      length = a.length;
+      if (length !== b.length) return false;
+      // Deep compare the contents, ignoring non-numeric properties.
+      while (length--) {
+        if (!eq(a[length], b[length], aStack, bStack)) return false;
+      }
+    } else {
+      // Deep compare objects.
+      var _keys = keys(a), key;
+      length = _keys.length;
+      // Ensure that both objects contain the same number of properties before comparing deep equality.
+      if (keys(b).length !== length) return false;
+      while (length--) {
+        // Deep compare each member
+        key = _keys[length];
+        if (!(has$1(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
+      }
+    }
+    // Remove the first object from the stack of traversed objects.
+    aStack.pop();
+    bStack.pop();
+    return true;
+  }
+
+  // Perform a deep comparison to check if two objects are equal.
+  function isEqual(a, b) {
+    return eq(a, b);
+  }
+
+  // Retrieve all the enumerable property names of an object.
+  function allKeys(obj) {
+    if (!isObject(obj)) return [];
+    var keys = [];
+    for (var key in obj) keys.push(key);
+    // Ahem, IE < 9.
+    if (hasEnumBug) collectNonEnumProps(obj, keys);
+    return keys;
+  }
+
+  // Since the regular `Object.prototype.toString` type tests don't work for
+  // some types in IE 11, we use a fingerprinting heuristic instead, based
+  // on the methods. It's not great, but it's the best we got.
+  // The fingerprint method lists are defined below.
+  function ie11fingerprint(methods) {
+    var length = getLength(methods);
+    return function(obj) {
+      if (obj == null) return false;
+      // `Map`, `WeakMap` and `Set` have no enumerable keys.
+      var keys = allKeys(obj);
+      if (getLength(keys)) return false;
+      for (var i = 0; i < length; i++) {
+        if (!isFunction$1(obj[methods[i]])) return false;
+      }
+      // If we are testing against `WeakMap`, we need to ensure that
+      // `obj` doesn't have a `forEach` method in order to distinguish
+      // it from a regular `Map`.
+      return methods !== weakMapMethods || !isFunction$1(obj[forEachName]);
+    };
+  }
+
+  // In the interest of compact minification, we write
+  // each string in the fingerprints only once.
+  var forEachName = 'forEach',
+      hasName = 'has',
+      commonInit = ['clear', 'delete'],
+      mapTail = ['get', hasName, 'set'];
+
+  // `Map`, `WeakMap` and `Set` each have slightly different
+  // combinations of the above sublists.
+  var mapMethods = commonInit.concat(forEachName, mapTail),
+      weakMapMethods = commonInit.concat(mapTail),
+      setMethods = ['add'].concat(commonInit, forEachName, hasName);
+
+  var isMap = isIE11 ? ie11fingerprint(mapMethods) : tagTester('Map');
+
+  var isWeakMap = isIE11 ? ie11fingerprint(weakMapMethods) : tagTester('WeakMap');
+
+  var isSet = isIE11 ? ie11fingerprint(setMethods) : tagTester('Set');
+
+  var isWeakSet = tagTester('WeakSet');
+
+  // Retrieve the values of an object's properties.
+  function values(obj) {
+    var _keys = keys(obj);
+    var length = _keys.length;
+    var values = Array(length);
+    for (var i = 0; i < length; i++) {
+      values[i] = obj[_keys[i]];
+    }
+    return values;
+  }
+
+  // Convert an object into a list of `[key, value]` pairs.
+  // The opposite of `_.object` with one argument.
+  function pairs(obj) {
+    var _keys = keys(obj);
+    var length = _keys.length;
+    var pairs = Array(length);
+    for (var i = 0; i < length; i++) {
+      pairs[i] = [_keys[i], obj[_keys[i]]];
+    }
+    return pairs;
+  }
+
+  // Invert the keys and values of an object. The values must be serializable.
+  function invert(obj) {
+    var result = {};
+    var _keys = keys(obj);
+    for (var i = 0, length = _keys.length; i < length; i++) {
+      result[obj[_keys[i]]] = _keys[i];
+    }
+    return result;
+  }
+
+  // Return a sorted list of the function names available on the object.
+  function functions(obj) {
+    var names = [];
+    for (var key in obj) {
+      if (isFunction$1(obj[key])) names.push(key);
+    }
+    return names.sort();
+  }
+
+  // An internal function for creating assigner functions.
+  function createAssigner(keysFunc, defaults) {
+    return function(obj) {
+      var length = arguments.length;
+      if (defaults) obj = Object(obj);
+      if (length < 2 || obj == null) return obj;
+      for (var index = 1; index < length; index++) {
+        var source = arguments[index],
+            keys = keysFunc(source),
+            l = keys.length;
+        for (var i = 0; i < l; i++) {
+          var key = keys[i];
+          if (!defaults || obj[key] === void 0) obj[key] = source[key];
+        }
+      }
+      return obj;
+    };
+  }
+
+  // Extend a given object with all the properties in passed-in object(s).
+  var extend = createAssigner(allKeys);
+
+  // Assigns a given object with all the own properties in the passed-in
+  // object(s).
+  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
+  var extendOwn = createAssigner(keys);
+
+  // Fill in a given object with default properties.
+  var defaults = createAssigner(allKeys, true);
+
+  // Create a naked function reference for surrogate-prototype-swapping.
+  function ctor() {
+    return function(){};
+  }
+
+  // An internal function for creating a new object that inherits from another.
+  function baseCreate(prototype) {
+    if (!isObject(prototype)) return {};
+    if (nativeCreate) return nativeCreate(prototype);
+    var Ctor = ctor();
+    Ctor.prototype = prototype;
+    var result = new Ctor;
+    Ctor.prototype = null;
+    return result;
+  }
+
+  // Creates an object that inherits from the given prototype object.
+  // If additional properties are provided then they will be added to the
+  // created object.
+  function create(prototype, props) {
+    var result = baseCreate(prototype);
+    if (props) extendOwn(result, props);
+    return result;
+  }
+
+  // Create a (shallow-cloned) duplicate of an object.
+  function clone(obj) {
+    if (!isObject(obj)) return obj;
+    return isArray(obj) ? obj.slice() : extend({}, obj);
+  }
+
+  // Invokes `interceptor` with the `obj` and then returns `obj`.
+  // The primary purpose of this method is to "tap into" a method chain, in
+  // order to perform operations on intermediate results within the chain.
+  function tap(obj, interceptor) {
+    interceptor(obj);
+    return obj;
+  }
+
+  // Normalize a (deep) property `path` to array.
+  // Like `_.iteratee`, this function can be customized.
+  function toPath$1(path) {
+    return isArray(path) ? path : [path];
+  }
+  _$1.toPath = toPath$1;
+
+  // Internal wrapper for `_.toPath` to enable minification.
+  // Similar to `cb` for `_.iteratee`.
+  function toPath(path) {
+    return _$1.toPath(path);
+  }
+
+  // Internal function to obtain a nested property in `obj` along `path`.
+  function deepGet(obj, path) {
+    var length = path.length;
+    for (var i = 0; i < length; i++) {
+      if (obj == null) return void 0;
+      obj = obj[path[i]];
+    }
+    return length ? obj : void 0;
+  }
+
+  // Get the value of the (deep) property on `path` from `object`.
+  // If any property in `path` does not exist or if the value is
+  // `undefined`, return `defaultValue` instead.
+  // The `path` is normalized through `_.toPath`.
+  function get(object, path, defaultValue) {
+    var value = deepGet(object, toPath(path));
+    return isUndefined(value) ? defaultValue : value;
+  }
+
+  // Shortcut function for checking if an object has a given property directly on
+  // itself (in other words, not on a prototype). Unlike the internal `has`
+  // function, this public version can also traverse nested properties.
+  function has(obj, path) {
+    path = toPath(path);
+    var length = path.length;
+    for (var i = 0; i < length; i++) {
+      var key = path[i];
+      if (!has$1(obj, key)) return false;
+      obj = obj[key];
+    }
+    return !!length;
+  }
+
+  // Keep the identity function around for default iteratees.
+  function identity(value) {
+    return value;
+  }
+
+  // Returns a predicate for checking whether an object has a given set of
+  // `key:value` pairs.
+  function matcher(attrs) {
+    attrs = extendOwn({}, attrs);
+    return function(obj) {
+      return isMatch(obj, attrs);
+    };
+  }
+
+  // Creates a function that, when passed an object, will traverse that object’s
+  // properties down the given `path`, specified as an array of keys or indices.
+  function property(path) {
+    path = toPath(path);
+    return function(obj) {
+      return deepGet(obj, path);
+    };
+  }
+
+  // Internal function that returns an efficient (for current engines) version
+  // of the passed-in callback, to be repeatedly applied in other Underscore
+  // functions.
+  function optimizeCb(func, context, argCount) {
+    if (context === void 0) return func;
+    switch (argCount == null ? 3 : argCount) {
+      case 1: return function(value) {
+        return func.call(context, value);
+      };
+      // The 2-argument case is omitted because we’re not using it.
+      case 3: return function(value, index, collection) {
+        return func.call(context, value, index, collection);
+      };
+      case 4: return function(accumulator, value, index, collection) {
+        return func.call(context, accumulator, value, index, collection);
+      };
+    }
+    return function() {
+      return func.apply(context, arguments);
+    };
+  }
+
+  // An internal function to generate callbacks that can be applied to each
+  // element in a collection, returning the desired result — either `_.identity`,
+  // an arbitrary callback, a property matcher, or a property accessor.
+  function baseIteratee(value, context, argCount) {
+    if (value == null) return identity;
+    if (isFunction$1(value)) return optimizeCb(value, context, argCount);
+    if (isObject(value) && !isArray(value)) return matcher(value);
+    return property(value);
+  }
+
+  // External wrapper for our callback generator. Users may customize
+  // `_.iteratee` if they want additional predicate/iteratee shorthand styles.
+  // This abstraction hides the internal-only `argCount` argument.
+  function iteratee(value, context) {
+    return baseIteratee(value, context, Infinity);
+  }
+  _$1.iteratee = iteratee;
+
+  // The function we call internally to generate a callback. It invokes
+  // `_.iteratee` if overridden, otherwise `baseIteratee`.
+  function cb(value, context, argCount) {
+    if (_$1.iteratee !== iteratee) return _$1.iteratee(value, context);
+    return baseIteratee(value, context, argCount);
+  }
+
+  // Returns the results of applying the `iteratee` to each element of `obj`.
+  // In contrast to `_.map` it returns an object.
+  function mapObject(obj, iteratee, context) {
+    iteratee = cb(iteratee, context);
+    var _keys = keys(obj),
+        length = _keys.length,
+        results = {};
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys[index];
+      results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
+    }
+    return results;
+  }
+
+  // Predicate-generating function. Often useful outside of Underscore.
+  function noop(){}
+
+  // Generates a function for a given object that returns a given property.
+  function propertyOf(obj) {
+    if (obj == null) return noop;
+    return function(path) {
+      return get(obj, path);
+    };
+  }
+
+  // Run a function **n** times.
+  function times(n, iteratee, context) {
+    var accum = Array(Math.max(0, n));
+    iteratee = optimizeCb(iteratee, context, 1);
+    for (var i = 0; i < n; i++) accum[i] = iteratee(i);
+    return accum;
+  }
+
+  // Return a random integer between `min` and `max` (inclusive).
+  function random(min, max) {
+    if (max == null) {
+      max = min;
+      min = 0;
+    }
+    return min + Math.floor(Math.random() * (max - min + 1));
+  }
+
+  // A (possibly faster) way to get the current timestamp as an integer.
+  var now = Date.now || function() {
+    return new Date().getTime();
+  };
+
+  // Internal helper to generate functions for escaping and unescaping strings
+  // to/from HTML interpolation.
+  function createEscaper(map) {
+    var escaper = function(match) {
+      return map[match];
+    };
+    // Regexes for identifying a key that needs to be escaped.
+    var source = '(?:' + keys(map).join('|') + ')';
+    var testRegexp = RegExp(source);
+    var replaceRegexp = RegExp(source, 'g');
+    return function(string) {
+      string = string == null ? '' : '' + string;
+      return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
+    };
+  }
+
+  // Internal list of HTML entities for escaping.
+  var escapeMap = {
+    '&': '&amp;',
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    "'": '&#x27;',
+    '`': '&#x60;'
+  };
+
+  // Function for escaping strings to HTML interpolation.
+  var _escape = createEscaper(escapeMap);
+
+  // Internal list of HTML entities for unescaping.
+  var unescapeMap = invert(escapeMap);
+
+  // Function for unescaping strings from HTML interpolation.
+  var _unescape = createEscaper(unescapeMap);
+
+  // By default, Underscore uses ERB-style template delimiters. Change the
+  // following template settings to use alternative delimiters.
+  var templateSettings = _$1.templateSettings = {
+    evaluate: /<%([\s\S]+?)%>/g,
+    interpolate: /<%=([\s\S]+?)%>/g,
+    escape: /<%-([\s\S]+?)%>/g
+  };
+
+  // When customizing `_.templateSettings`, if you don't want to define an
+  // interpolation, evaluation or escaping regex, we need one that is
+  // guaranteed not to match.
+  var noMatch = /(.)^/;
+
+  // Certain characters need to be escaped so that they can be put into a
+  // string literal.
+  var escapes = {
+    "'": "'",
+    '\\': '\\',
+    '\r': 'r',
+    '\n': 'n',
+    '\u2028': 'u2028',
+    '\u2029': 'u2029'
+  };
+
+  var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;
+
+  function escapeChar(match) {
+    return '\\' + escapes[match];
+  }
+
+  // In order to prevent third-party code injection through
+  // `_.templateSettings.variable`, we test it against the following regular
+  // expression. It is intentionally a bit more liberal than just matching valid
+  // identifiers, but still prevents possible loopholes through defaults or
+  // destructuring assignment.
+  var bareIdentifier = /^\s*(\w|\$)+\s*$/;
+
+  // JavaScript micro-templating, similar to John Resig's implementation.
+  // Underscore templating handles arbitrary delimiters, preserves whitespace,
+  // and correctly escapes quotes within interpolated code.
+  // NB: `oldSettings` only exists for backwards compatibility.
+  function template(text, settings, oldSettings) {
+    if (!settings && oldSettings) settings = oldSettings;
+    settings = defaults({}, settings, _$1.templateSettings);
+
+    // Combine delimiters into one regular expression via alternation.
+    var matcher = RegExp([
+      (settings.escape || noMatch).source,
+      (settings.interpolate || noMatch).source,
+      (settings.evaluate || noMatch).source
+    ].join('|') + '|$', 'g');
+
+    // Compile the template source, escaping string literals appropriately.
+    var index = 0;
+    var source = "__p+='";
+    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
+      source += text.slice(index, offset).replace(escapeRegExp, escapeChar);
+      index = offset + match.length;
+
+      if (escape) {
+        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
+      } else if (interpolate) {
+        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
+      } else if (evaluate) {
+        source += "';\n" + evaluate + "\n__p+='";
+      }
+
+      // Adobe VMs need the match returned to produce the correct offset.
+      return match;
+    });
+    source += "';\n";
+
+    var argument = settings.variable;
+    if (argument) {
+      // Insure against third-party code injection. (CVE-2021-23358)
+      if (!bareIdentifier.test(argument)) throw new Error(
+        'variable is not a bare identifier: ' + argument
+      );
+    } else {
+      // If a variable is not specified, place data values in local scope.
+      source = 'with(obj||{}){\n' + source + '}\n';
+      argument = 'obj';
+    }
+
+    source = "var __t,__p='',__j=Array.prototype.join," +
+      "print=function(){__p+=__j.call(arguments,'');};\n" +
+      source + 'return __p;\n';
+
+    var render;
+    try {
+      render = new Function(argument, '_', source);
+    } catch (e) {
+      e.source = source;
+      throw e;
+    }
+
+    var template = function(data) {
+      return render.call(this, data, _$1);
+    };
+
+    // Provide the compiled source as a convenience for precompilation.
+    template.source = 'function(' + argument + '){\n' + source + '}';
+
+    return template;
+  }
+
+  // Traverses the children of `obj` along `path`. If a child is a function, it
+  // is invoked with its parent as context. Returns the value of the final
+  // child, or `fallback` if any child is undefined.
+  function result(obj, path, fallback) {
+    path = toPath(path);
+    var length = path.length;
+    if (!length) {
+      return isFunction$1(fallback) ? fallback.call(obj) : fallback;
+    }
+    for (var i = 0; i < length; i++) {
+      var prop = obj == null ? void 0 : obj[path[i]];
+      if (prop === void 0) {
+        prop = fallback;
+        i = length; // Ensure we don't continue iterating.
+      }
+      obj = isFunction$1(prop) ? prop.call(obj) : prop;
+    }
+    return obj;
+  }
+
+  // Generate a unique integer id (unique within the entire client session).
+  // Useful for temporary DOM ids.
+  var idCounter = 0;
+  function uniqueId(prefix) {
+    var id = ++idCounter + '';
+    return prefix ? prefix + id : id;
+  }
+
+  // Start chaining a wrapped Underscore object.
+  function chain(obj) {
+    var instance = _$1(obj);
+    instance._chain = true;
+    return instance;
+  }
+
+  // Internal function to execute `sourceFunc` bound to `context` with optional
+  // `args`. Determines whether to execute a function as a constructor or as a
+  // normal function.
+  function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
+    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
+    var self = baseCreate(sourceFunc.prototype);
+    var result = sourceFunc.apply(self, args);
+    if (isObject(result)) return result;
+    return self;
+  }
+
+  // Partially apply a function by creating a version that has had some of its
+  // arguments pre-filled, without changing its dynamic `this` context. `_` acts
+  // as a placeholder by default, allowing any combination of arguments to be
+  // pre-filled. Set `_.partial.placeholder` for a custom placeholder argument.
+  var partial = restArguments(function(func, boundArgs) {
+    var placeholder = partial.placeholder;
+    var bound = function() {
+      var position = 0, length = boundArgs.length;
+      var args = Array(length);
+      for (var i = 0; i < length; i++) {
+        args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
+      }
+      while (position < arguments.length) args.push(arguments[position++]);
+      return executeBound(func, bound, this, this, args);
+    };
+    return bound;
+  });
+
+  partial.placeholder = _$1;
+
+  // Create a function bound to a given object (assigning `this`, and arguments,
+  // optionally).
+  var bind = restArguments(function(func, context, args) {
+    if (!isFunction$1(func)) throw new TypeError('Bind must be called on a function');
+    var bound = restArguments(function(callArgs) {
+      return executeBound(func, bound, context, this, args.concat(callArgs));
+    });
+    return bound;
+  });
+
+  // Internal helper for collection methods to determine whether a collection
+  // should be iterated as an array or as an object.
+  // Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
+  // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
+  var isArrayLike = createSizePropertyCheck(getLength);
+
+  // Internal implementation of a recursive `flatten` function.
+  function flatten$1(input, depth, strict, output) {
+    output = output || [];
+    if (!depth && depth !== 0) {
+      depth = Infinity;
+    } else if (depth <= 0) {
+      return output.concat(input);
+    }
+    var idx = output.length;
+    for (var i = 0, length = getLength(input); i < length; i++) {
+      var value = input[i];
+      if (isArrayLike(value) && (isArray(value) || isArguments$1(value))) {
+        // Flatten current level of array or arguments object.
+        if (depth > 1) {
+          flatten$1(value, depth - 1, strict, output);
+          idx = output.length;
+        } else {
+          var j = 0, len = value.length;
+          while (j < len) output[idx++] = value[j++];
+        }
+      } else if (!strict) {
+        output[idx++] = value;
+      }
+    }
+    return output;
+  }
+
+  // Bind a number of an object's methods to that object. Remaining arguments
+  // are the method names to be bound. Useful for ensuring that all callbacks
+  // defined on an object belong to it.
+  var bindAll = restArguments(function(obj, keys) {
+    keys = flatten$1(keys, false, false);
+    var index = keys.length;
+    if (index < 1) throw new Error('bindAll must be passed function names');
+    while (index--) {
+      var key = keys[index];
+      obj[key] = bind(obj[key], obj);
+    }
+    return obj;
+  });
+
+  // Memoize an expensive function by storing its results.
+  function memoize(func, hasher) {
+    var memoize = function(key) {
+      var cache = memoize.cache;
+      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
+      if (!has$1(cache, address)) cache[address] = func.apply(this, arguments);
+      return cache[address];
+    };
+    memoize.cache = {};
+    return memoize;
+  }
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  var delay = restArguments(function(func, wait, args) {
+    return setTimeout(function() {
+      return func.apply(null, args);
+    }, wait);
+  });
+
+  // Defers a function, scheduling it to run after the current call stack has
+  // cleared.
+  var defer = partial(delay, _$1, 1);
+
+  // Returns a function, that, when invoked, will only be triggered at most once
+  // during a given window of time. Normally, the throttled function will run
+  // as much as it can, without ever going more than once per `wait` duration;
+  // but if you'd like to disable the execution on the leading edge, pass
+  // `{leading: false}`. To disable execution on the trailing edge, ditto.
+  function throttle(func, wait, options) {
+    var timeout, context, args, result;
+    var previous = 0;
+    if (!options) options = {};
+
+    var later = function() {
+      previous = options.leading === false ? 0 : now();
+      timeout = null;
+      result = func.apply(context, args);
+      if (!timeout) context = args = null;
+    };
+
+    var throttled = function() {
+      var _now = now();
+      if (!previous && options.leading === false) previous = _now;
+      var remaining = wait - (_now - previous);
+      context = this;
+      args = arguments;
+      if (remaining <= 0 || remaining > wait) {
+        if (timeout) {
+          clearTimeout(timeout);
+          timeout = null;
+        }
+        previous = _now;
+        result = func.apply(context, args);
+        if (!timeout) context = args = null;
+      } else if (!timeout && options.trailing !== false) {
+        timeout = setTimeout(later, remaining);
+      }
+      return result;
+    };
+
+    throttled.cancel = function() {
+      clearTimeout(timeout);
+      previous = 0;
+      timeout = context = args = null;
+    };
+
+    return throttled;
+  }
+
+  // When a sequence of calls of the returned function ends, the argument
+  // function is triggered. The end of a sequence is defined by the `wait`
+  // parameter. If `immediate` is passed, the argument function will be
+  // triggered at the beginning of the sequence instead of at the end.
+  function debounce(func, wait, immediate) {
+    var timeout, previous, args, result, context;
+
+    var later = function() {
+      var passed = now() - previous;
+      if (wait > passed) {
+        timeout = setTimeout(later, wait - passed);
+      } else {
+        timeout = null;
+        if (!immediate) result = func.apply(context, args);
+        // This check is needed because `func` can recursively invoke `debounced`.
+        if (!timeout) args = context = null;
+      }
+    };
+
+    var debounced = restArguments(function(_args) {
+      context = this;
+      args = _args;
+      previous = now();
+      if (!timeout) {
+        timeout = setTimeout(later, wait);
+        if (immediate) result = func.apply(context, args);
+      }
+      return result;
+    });
+
+    debounced.cancel = function() {
+      clearTimeout(timeout);
+      timeout = args = context = null;
+    };
+
+    return debounced;
+  }
+
+  // Returns the first function passed as an argument to the second,
+  // allowing you to adjust arguments, run code before and after, and
+  // conditionally execute the original function.
+  function wrap(func, wrapper) {
+    return partial(wrapper, func);
+  }
+
+  // Returns a negated version of the passed-in predicate.
+  function negate(predicate) {
+    return function() {
+      return !predicate.apply(this, arguments);
+    };
+  }
+
+  // Returns a function that is the composition of a list of functions, each
+  // consuming the return value of the function that follows.
+  function compose() {
+    var args = arguments;
+    var start = args.length - 1;
+    return function() {
+      var i = start;
+      var result = args[start].apply(this, arguments);
+      while (i--) result = args[i].call(this, result);
+      return result;
+    };
+  }
+
+  // Returns a function that will only be executed on and after the Nth call.
+  function after(times, func) {
+    return function() {
+      if (--times < 1) {
+        return func.apply(this, arguments);
+      }
+    };
+  }
+
+  // Returns a function that will only be executed up to (but not including) the
+  // Nth call.
+  function before(times, func) {
+    var memo;
+    return function() {
+      if (--times > 0) {
+        memo = func.apply(this, arguments);
+      }
+      if (times <= 1) func = null;
+      return memo;
+    };
+  }
+
+  // Returns a function that will be executed at most one time, no matter how
+  // often you call it. Useful for lazy initialization.
+  var once = partial(before, 2);
+
+  // Returns the first key on an object that passes a truth test.
+  function findKey(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = keys(obj), key;
+    for (var i = 0, length = _keys.length; i < length; i++) {
+      key = _keys[i];
+      if (predicate(obj[key], key, obj)) return key;
+    }
+  }
+
+  // Internal function to generate `_.findIndex` and `_.findLastIndex`.
+  function createPredicateIndexFinder(dir) {
+    return function(array, predicate, context) {
+      predicate = cb(predicate, context);
+      var length = getLength(array);
+      var index = dir > 0 ? 0 : length - 1;
+      for (; index >= 0 && index < length; index += dir) {
+        if (predicate(array[index], index, array)) return index;
+      }
+      return -1;
+    };
+  }
+
+  // Returns the first index on an array-like that passes a truth test.
+  var findIndex = createPredicateIndexFinder(1);
+
+  // Returns the last index on an array-like that passes a truth test.
+  var findLastIndex = createPredicateIndexFinder(-1);
+
+  // Use a comparator function to figure out the smallest index at which
+  // an object should be inserted so as to maintain order. Uses binary search.
+  function sortedIndex(array, obj, iteratee, context) {
+    iteratee = cb(iteratee, context, 1);
+    var value = iteratee(obj);
+    var low = 0, high = getLength(array);
+    while (low < high) {
+      var mid = Math.floor((low + high) / 2);
+      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
+    }
+    return low;
+  }
+
+  // Internal function to generate the `_.indexOf` and `_.lastIndexOf` functions.
+  function createIndexFinder(dir, predicateFind, sortedIndex) {
+    return function(array, item, idx) {
+      var i = 0, length = getLength(array);
+      if (typeof idx == 'number') {
+        if (dir > 0) {
+          i = idx >= 0 ? idx : Math.max(idx + length, i);
+        } else {
+          length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
+        }
+      } else if (sortedIndex && idx && length) {
+        idx = sortedIndex(array, item);
+        return array[idx] === item ? idx : -1;
+      }
+      if (item !== item) {
+        idx = predicateFind(slice.call(array, i, length), isNaN$1);
+        return idx >= 0 ? idx + i : -1;
+      }
+      for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
+        if (array[idx] === item) return idx;
+      }
+      return -1;
+    };
+  }
+
+  // Return the position of the first occurrence of an item in an array,
+  // or -1 if the item is not included in the array.
+  // If the array is large and already in sort order, pass `true`
+  // for **isSorted** to use binary search.
+  var indexOf = createIndexFinder(1, findIndex, sortedIndex);
+
+  // Return the position of the last occurrence of an item in an array,
+  // or -1 if the item is not included in the array.
+  var lastIndexOf = createIndexFinder(-1, findLastIndex);
+
+  // Return the first value which passes a truth test.
+  function find(obj, predicate, context) {
+    var keyFinder = isArrayLike(obj) ? findIndex : findKey;
+    var key = keyFinder(obj, predicate, context);
+    if (key !== void 0 && key !== -1) return obj[key];
+  }
+
+  // Convenience version of a common use case of `_.find`: getting the first
+  // object containing specific `key:value` pairs.
+  function findWhere(obj, attrs) {
+    return find(obj, matcher(attrs));
+  }
+
+  // The cornerstone for collection functions, an `each`
+  // implementation, aka `forEach`.
+  // Handles raw objects in addition to array-likes. Treats all
+  // sparse array-likes as if they were dense.
+  function each(obj, iteratee, context) {
+    iteratee = optimizeCb(iteratee, context);
+    var i, length;
+    if (isArrayLike(obj)) {
+      for (i = 0, length = obj.length; i < length; i++) {
+        iteratee(obj[i], i, obj);
+      }
+    } else {
+      var _keys = keys(obj);
+      for (i = 0, length = _keys.length; i < length; i++) {
+        iteratee(obj[_keys[i]], _keys[i], obj);
+      }
+    }
+    return obj;
+  }
+
+  // Return the results of applying the iteratee to each element.
+  function map(obj, iteratee, context) {
+    iteratee = cb(iteratee, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length,
+        results = Array(length);
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      results[index] = iteratee(obj[currentKey], currentKey, obj);
+    }
+    return results;
+  }
+
+  // Internal helper to create a reducing function, iterating left or right.
+  function createReduce(dir) {
+    // Wrap code that reassigns argument variables in a separate function than
+    // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
+    var reducer = function(obj, iteratee, memo, initial) {
+      var _keys = !isArrayLike(obj) && keys(obj),
+          length = (_keys || obj).length,
+          index = dir > 0 ? 0 : length - 1;
+      if (!initial) {
+        memo = obj[_keys ? _keys[index] : index];
+        index += dir;
+      }
+      for (; index >= 0 && index < length; index += dir) {
+        var currentKey = _keys ? _keys[index] : index;
+        memo = iteratee(memo, obj[currentKey], currentKey, obj);
+      }
+      return memo;
+    };
+
+    return function(obj, iteratee, memo, context) {
+      var initial = arguments.length >= 3;
+      return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
+    };
+  }
+
+  // **Reduce** builds up a single result from a list of values, aka `inject`,
+  // or `foldl`.
+  var reduce = createReduce(1);
+
+  // The right-associative version of reduce, also known as `foldr`.
+  var reduceRight = createReduce(-1);
+
+  // Return all the elements that pass a truth test.
+  function filter(obj, predicate, context) {
+    var results = [];
+    predicate = cb(predicate, context);
+    each(obj, function(value, index, list) {
+      if (predicate(value, index, list)) results.push(value);
+    });
+    return results;
+  }
+
+  // Return all the elements for which a truth test fails.
+  function reject(obj, predicate, context) {
+    return filter(obj, negate(cb(predicate)), context);
+  }
+
+  // Determine whether all of the elements pass a truth test.
+  function every(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length;
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      if (!predicate(obj[currentKey], currentKey, obj)) return false;
+    }
+    return true;
+  }
+
+  // Determine if at least one element in the object passes a truth test.
+  function some(obj, predicate, context) {
+    predicate = cb(predicate, context);
+    var _keys = !isArrayLike(obj) && keys(obj),
+        length = (_keys || obj).length;
+    for (var index = 0; index < length; index++) {
+      var currentKey = _keys ? _keys[index] : index;
+      if (predicate(obj[currentKey], currentKey, obj)) return true;
+    }
+    return false;
+  }
+
+  // Determine if the array or object contains a given item (using `===`).
+  function contains(obj, item, fromIndex, guard) {
+    if (!isArrayLike(obj)) obj = values(obj);
+    if (typeof fromIndex != 'number' || guard) fromIndex = 0;
+    return indexOf(obj, item, fromIndex) >= 0;
+  }
+
+  // Invoke a method (with arguments) on every item in a collection.
+  var invoke = restArguments(function(obj, path, args) {
+    var contextPath, func;
+    if (isFunction$1(path)) {
+      func = path;
+    } else {
+      path = toPath(path);
+      contextPath = path.slice(0, -1);
+      path = path[path.length - 1];
+    }
+    return map(obj, function(context) {
+      var method = func;
+      if (!method) {
+        if (contextPath && contextPath.length) {
+          context = deepGet(context, contextPath);
+        }
+        if (context == null) return void 0;
+        method = context[path];
+      }
+      return method == null ? method : method.apply(context, args);
+    });
+  });
+
+  // Convenience version of a common use case of `_.map`: fetching a property.
+  function pluck(obj, key) {
+    return map(obj, property(key));
+  }
+
+  // Convenience version of a common use case of `_.filter`: selecting only
+  // objects containing specific `key:value` pairs.
+  function where(obj, attrs) {
+    return filter(obj, matcher(attrs));
+  }
+
+  // Return the maximum element (or element-based computation).
+  function max(obj, iteratee, context) {
+    var result = -Infinity, lastComputed = -Infinity,
+        value, computed;
+    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
+      obj = isArrayLike(obj) ? obj : values(obj);
+      for (var i = 0, length = obj.length; i < length; i++) {
+        value = obj[i];
+        if (value != null && value > result) {
+          result = value;
+        }
+      }
+    } else {
+      iteratee = cb(iteratee, context);
+      each(obj, function(v, index, list) {
+        computed = iteratee(v, index, list);
+        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
+          result = v;
+          lastComputed = computed;
+        }
+      });
+    }
+    return result;
+  }
+
+  // Return the minimum element (or element-based computation).
+  function min(obj, iteratee, context) {
+    var result = Infinity, lastComputed = Infinity,
+        value, computed;
+    if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
+      obj = isArrayLike(obj) ? obj : values(obj);
+      for (var i = 0, length = obj.length; i < length; i++) {
+        value = obj[i];
+        if (value != null && value < result) {
+          result = value;
+        }
+      }
+    } else {
+      iteratee = cb(iteratee, context);
+      each(obj, function(v, index, list) {
+        computed = iteratee(v, index, list);
+        if (computed < lastComputed || computed === Infinity && result === Infinity) {
+          result = v;
+          lastComputed = computed;
+        }
+      });
+    }
+    return result;
+  }
+
+  // Sample **n** random values from a collection using the modern version of the
+  // [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
+  // If **n** is not specified, returns a single random element.
+  // The internal `guard` argument allows it to work with `_.map`.
+  function sample(obj, n, guard) {
+    if (n == null || guard) {
+      if (!isArrayLike(obj)) obj = values(obj);
+      return obj[random(obj.length - 1)];
+    }
+    var sample = isArrayLike(obj) ? clone(obj) : values(obj);
+    var length = getLength(sample);
+    n = Math.max(Math.min(n, length), 0);
+    var last = length - 1;
+    for (var index = 0; index < n; index++) {
+      var rand = random(index, last);
+      var temp = sample[index];
+      sample[index] = sample[rand];
+      sample[rand] = temp;
+    }
+    return sample.slice(0, n);
+  }
+
+  // Shuffle a collection.
+  function shuffle(obj) {
+    return sample(obj, Infinity);
+  }
+
+  // Sort the object's values by a criterion produced by an iteratee.
+  function sortBy(obj, iteratee, context) {
+    var index = 0;
+    iteratee = cb(iteratee, context);
+    return pluck(map(obj, function(value, key, list) {
+      return {
+        value: value,
+        index: index++,
+        criteria: iteratee(value, key, list)
+      };
+    }).sort(function(left, right) {
+      var a = left.criteria;
+      var b = right.criteria;
+      if (a !== b) {
+        if (a > b || a === void 0) return 1;
+        if (a < b || b === void 0) return -1;
+      }
+      return left.index - right.index;
+    }), 'value');
+  }
+
+  // An internal function used for aggregate "group by" operations.
+  function group(behavior, partition) {
+    return function(obj, iteratee, context) {
+      var result = partition ? [[], []] : {};
+      iteratee = cb(iteratee, context);
+      each(obj, function(value, index) {
+        var key = iteratee(value, index, obj);
+        behavior(result, value, key);
+      });
+      return result;
+    };
+  }
+
+  // Groups the object's values by a criterion. Pass either a string attribute
+  // to group by, or a function that returns the criterion.
+  var groupBy = group(function(result, value, key) {
+    if (has$1(result, key)) result[key].push(value); else result[key] = [value];
+  });
+
+  // Indexes the object's values by a criterion, similar to `_.groupBy`, but for
+  // when you know that your index values will be unique.
+  var indexBy = group(function(result, value, key) {
+    result[key] = value;
+  });
+
+  // Counts instances of an object that group by a certain criterion. Pass
+  // either a string attribute to count by, or a function that returns the
+  // criterion.
+  var countBy = group(function(result, value, key) {
+    if (has$1(result, key)) result[key]++; else result[key] = 1;
+  });
+
+  // Split a collection into two arrays: one whose elements all pass the given
+  // truth test, and one whose elements all do not pass the truth test.
+  var partition = group(function(result, value, pass) {
+    result[pass ? 0 : 1].push(value);
+  }, true);
+
+  // Safely create a real, live array from anything iterable.
+  var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
+  function toArray(obj) {
+    if (!obj) return [];
+    if (isArray(obj)) return slice.call(obj);
+    if (isString(obj)) {
+      // Keep surrogate pair characters together.
+      return obj.match(reStrSymbol);
+    }
+    if (isArrayLike(obj)) return map(obj, identity);
+    return values(obj);
+  }
+
+  // Return the number of elements in a collection.
+  function size(obj) {
+    if (obj == null) return 0;
+    return isArrayLike(obj) ? obj.length : keys(obj).length;
+  }
+
+  // Internal `_.pick` helper function to determine whether `key` is an enumerable
+  // property name of `obj`.
+  function keyInObj(value, key, obj) {
+    return key in obj;
+  }
+
+  // Return a copy of the object only containing the allowed properties.
+  var pick = restArguments(function(obj, keys) {
+    var result = {}, iteratee = keys[0];
+    if (obj == null) return result;
+    if (isFunction$1(iteratee)) {
+      if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
+      keys = allKeys(obj);
+    } else {
+      iteratee = keyInObj;
+      keys = flatten$1(keys, false, false);
+      obj = Object(obj);
+    }
+    for (var i = 0, length = keys.length; i < length; i++) {
+      var key = keys[i];
+      var value = obj[key];
+      if (iteratee(value, key, obj)) result[key] = value;
+    }
+    return result;
+  });
+
+  // Return a copy of the object without the disallowed properties.
+  var omit = restArguments(function(obj, keys) {
+    var iteratee = keys[0], context;
+    if (isFunction$1(iteratee)) {
+      iteratee = negate(iteratee);
+      if (keys.length > 1) context = keys[1];
+    } else {
+      keys = map(flatten$1(keys, false, false), String);
+      iteratee = function(value, key) {
+        return !contains(keys, key);
+      };
+    }
+    return pick(obj, iteratee, context);
+  });
+
+  // Returns everything but the last entry of the array. Especially useful on
+  // the arguments object. Passing **n** will return all the values in
+  // the array, excluding the last N.
+  function initial(array, n, guard) {
+    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
+  }
+
+  // Get the first element of an array. Passing **n** will return the first N
+  // values in the array. The **guard** check allows it to work with `_.map`.
+  function first(array, n, guard) {
+    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+    if (n == null || guard) return array[0];
+    return initial(array, array.length - n);
+  }
+
+  // Returns everything but the first entry of the `array`. Especially useful on
+  // the `arguments` object. Passing an **n** will return the rest N values in the
+  // `array`.
+  function rest(array, n, guard) {
+    return slice.call(array, n == null || guard ? 1 : n);
+  }
+
+  // Get the last element of an array. Passing **n** will return the last N
+  // values in the array.
+  function last(array, n, guard) {
+    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+    if (n == null || guard) return array[array.length - 1];
+    return rest(array, Math.max(0, array.length - n));
+  }
+
+  // Trim out all falsy values from an array.
+  function compact(array) {
+    return filter(array, Boolean);
+  }
+
+  // Flatten out an array, either recursively (by default), or up to `depth`.
+  // Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively.
+  function flatten(array, depth) {
+    return flatten$1(array, depth, false);
+  }
+
+  // Take the difference between one array and a number of other arrays.
+  // Only the elements present in just the first array will remain.
+  var difference = restArguments(function(array, rest) {
+    rest = flatten$1(rest, true, true);
+    return filter(array, function(value){
+      return !contains(rest, value);
+    });
+  });
+
+  // Return a version of the array that does not contain the specified value(s).
+  var without = restArguments(function(array, otherArrays) {
+    return difference(array, otherArrays);
+  });
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  // The faster algorithm will not work with an iteratee if the iteratee
+  // is not a one-to-one function, so providing an iteratee will disable
+  // the faster algorithm.
+  function uniq(array, isSorted, iteratee, context) {
+    if (!isBoolean(isSorted)) {
+      context = iteratee;
+      iteratee = isSorted;
+      isSorted = false;
+    }
+    if (iteratee != null) iteratee = cb(iteratee, context);
+    var result = [];
+    var seen = [];
+    for (var i = 0, length = getLength(array); i < length; i++) {
+      var value = array[i],
+          computed = iteratee ? iteratee(value, i, array) : value;
+      if (isSorted && !iteratee) {
+        if (!i || seen !== computed) result.push(value);
+        seen = computed;
+      } else if (iteratee) {
+        if (!contains(seen, computed)) {
+          seen.push(computed);
+          result.push(value);
+        }
+      } else if (!contains(result, value)) {
+        result.push(value);
+      }
+    }
+    return result;
+  }
+
+  // Produce an array that contains the union: each distinct element from all of
+  // the passed-in arrays.
+  var union = restArguments(function(arrays) {
+    return uniq(flatten$1(arrays, true, true));
+  });
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays.
+  function intersection(array) {
+    var result = [];
+    var argsLength = arguments.length;
+    for (var i = 0, length = getLength(array); i < length; i++) {
+      var item = array[i];
+      if (contains(result, item)) continue;
+      var j;
+      for (j = 1; j < argsLength; j++) {
+        if (!contains(arguments[j], item)) break;
+      }
+      if (j === argsLength) result.push(item);
+    }
+    return result;
+  }
+
+  // Complement of zip. Unzip accepts an array of arrays and groups
+  // each array's elements on shared indices.
+  function unzip(array) {
+    var length = array && max(array, getLength).length || 0;
+    var result = Array(length);
+
+    for (var index = 0; index < length; index++) {
+      result[index] = pluck(array, index);
+    }
+    return result;
+  }
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  var zip = restArguments(unzip);
+
+  // Converts lists into objects. Pass either a single array of `[key, value]`
+  // pairs, or two parallel arrays of the same length -- one of keys, and one of
+  // the corresponding values. Passing by pairs is the reverse of `_.pairs`.
+  function object(list, values) {
+    var result = {};
+    for (var i = 0, length = getLength(list); i < length; i++) {
+      if (values) {
+        result[list[i]] = values[i];
+      } else {
+        result[list[i][0]] = list[i][1];
+      }
+    }
+    return result;
+  }
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python `range()` function. See
+  // [the Python documentation](https://docs.python.org/library/functions.html#range).
+  function range(start, stop, step) {
+    if (stop == null) {
+      stop = start || 0;
+      start = 0;
+    }
+    if (!step) {
+      step = stop < start ? -1 : 1;
+    }
+
+    var length = Math.max(Math.ceil((stop - start) / step), 0);
+    var range = Array(length);
+
+    for (var idx = 0; idx < length; idx++, start += step) {
+      range[idx] = start;
+    }
+
+    return range;
+  }
+
+  // Chunk a single array into multiple arrays, each containing `count` or fewer
+  // items.
+  function chunk(array, count) {
+    if (count == null || count < 1) return [];
+    var result = [];
+    var i = 0, length = array.length;
+    while (i < length) {
+      result.push(slice.call(array, i, i += count));
+    }
+    return result;
+  }
+
+  // Helper function to continue chaining intermediate results.
+  function chainResult(instance, obj) {
+    return instance._chain ? _$1(obj).chain() : obj;
+  }
+
+  // Add your own custom functions to the Underscore object.
+  function mixin(obj) {
+    each(functions(obj), function(name) {
+      var func = _$1[name] = obj[name];
+      _$1.prototype[name] = function() {
+        var args = [this._wrapped];
+        push.apply(args, arguments);
+        return chainResult(this, func.apply(_$1, args));
+      };
+    });
+    return _$1;
+  }
+
+  // Add all mutator `Array` functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = ArrayProto[name];
+    _$1.prototype[name] = function() {
+      var obj = this._wrapped;
+      if (obj != null) {
+        method.apply(obj, arguments);
+        if ((name === 'shift' || name === 'splice') && obj.length === 0) {
+          delete obj[0];
+        }
+      }
+      return chainResult(this, obj);
+    };
+  });
+
+  // Add all accessor `Array` functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
+    var method = ArrayProto[name];
+    _$1.prototype[name] = function() {
+      var obj = this._wrapped;
+      if (obj != null) obj = method.apply(obj, arguments);
+      return chainResult(this, obj);
+    };
+  });
+
+  // Named Exports
+
+  var allExports = {
+    __proto__: null,
+    VERSION: VERSION,
+    restArguments: restArguments,
+    isObject: isObject,
+    isNull: isNull,
+    isUndefined: isUndefined,
+    isBoolean: isBoolean,
+    isElement: isElement,
+    isString: isString,
+    isNumber: isNumber,
+    isDate: isDate,
+    isRegExp: isRegExp,
+    isError: isError,
+    isSymbol: isSymbol,
+    isArrayBuffer: isArrayBuffer,
+    isDataView: isDataView$1,
+    isArray: isArray,
+    isFunction: isFunction$1,
+    isArguments: isArguments$1,
+    isFinite: isFinite$1,
+    isNaN: isNaN$1,
+    isTypedArray: isTypedArray$1,
+    isEmpty: isEmpty,
+    isMatch: isMatch,
+    isEqual: isEqual,
+    isMap: isMap,
+    isWeakMap: isWeakMap,
+    isSet: isSet,
+    isWeakSet: isWeakSet,
+    keys: keys,
+    allKeys: allKeys,
+    values: values,
+    pairs: pairs,
+    invert: invert,
+    functions: functions,
+    methods: functions,
+    extend: extend,
+    extendOwn: extendOwn,
+    assign: extendOwn,
+    defaults: defaults,
+    create: create,
+    clone: clone,
+    tap: tap,
+    get: get,
+    has: has,
+    mapObject: mapObject,
+    identity: identity,
+    constant: constant,
+    noop: noop,
+    toPath: toPath$1,
+    property: property,
+    propertyOf: propertyOf,
+    matcher: matcher,
+    matches: matcher,
+    times: times,
+    random: random,
+    now: now,
+    escape: _escape,
+    unescape: _unescape,
+    templateSettings: templateSettings,
+    template: template,
+    result: result,
+    uniqueId: uniqueId,
+    chain: chain,
+    iteratee: iteratee,
+    partial: partial,
+    bind: bind,
+    bindAll: bindAll,
+    memoize: memoize,
+    delay: delay,
+    defer: defer,
+    throttle: throttle,
+    debounce: debounce,
+    wrap: wrap,
+    negate: negate,
+    compose: compose,
+    after: after,
+    before: before,
+    once: once,
+    findKey: findKey,
+    findIndex: findIndex,
+    findLastIndex: findLastIndex,
+    sortedIndex: sortedIndex,
+    indexOf: indexOf,
+    lastIndexOf: lastIndexOf,
+    find: find,
+    detect: find,
+    findWhere: findWhere,
+    each: each,
+    forEach: each,
+    map: map,
+    collect: map,
+    reduce: reduce,
+    foldl: reduce,
+    inject: reduce,
+    reduceRight: reduceRight,
+    foldr: reduceRight,
+    filter: filter,
+    select: filter,
+    reject: reject,
+    every: every,
+    all: every,
+    some: some,
+    any: some,
+    contains: contains,
+    includes: contains,
+    include: contains,
+    invoke: invoke,
+    pluck: pluck,
+    where: where,
+    max: max,
+    min: min,
+    shuffle: shuffle,
+    sample: sample,
+    sortBy: sortBy,
+    groupBy: groupBy,
+    indexBy: indexBy,
+    countBy: countBy,
+    partition: partition,
+    toArray: toArray,
+    size: size,
+    pick: pick,
+    omit: omit,
+    first: first,
+    head: first,
+    take: first,
+    initial: initial,
+    last: last,
+    rest: rest,
+    tail: rest,
+    drop: rest,
+    compact: compact,
+    flatten: flatten,
+    without: without,
+    uniq: uniq,
+    unique: uniq,
+    union: union,
+    intersection: intersection,
+    difference: difference,
+    unzip: unzip,
+    transpose: unzip,
+    zip: zip,
+    object: object,
+    range: range,
+    chunk: chunk,
+    mixin: mixin,
+    'default': _$1
+  };
+
+  // Default Export
+
+  // Add all of the Underscore functions to the wrapper object.
+  var _ = mixin(allExports);
+  // Legacy Node.js API.
+  _._ = _;
+
+  return _;
+
+})));
+//# sourceMappingURL=underscore-umd.js.map
diff --git a/docs/_build/html/_static/underscore.js b/docs/_build/html/_static/underscore.js
index 5b55f32b..cf177d42 100644
--- a/docs/_build/html/_static/underscore.js
+++ b/docs/_build/html/_static/underscore.js
@@ -1,31 +1,6 @@
-// Underscore.js 1.3.1
-// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
-// Underscore is freely distributable under the MIT license.
-// Portions of Underscore are inspired or borrowed from Prototype,
-// Oliver Steele's Functional, and John Resig's Micro-Templating.
-// For all details and documentation:
-// http://documentcloud.github.com/underscore
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diff --git a/docs/_build/html/development.html b/docs/_build/html/development.html
index f0b6e3f1..fdac9816 100644
--- a/docs/_build/html/development.html
+++ b/docs/_build/html/development.html
@@ -1,70 +1,36 @@
-
-
 <!DOCTYPE html>
-<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
+<html class="writer-html5" lang="en" >
 <head>
-  <meta charset="utf-8">
-  
-  <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  
-  <title>Development &mdash; Django Ditto 1.4.1 documentation</title>
-  
-
-  
-  
-  
-  
-
-  
-  <script type="text/javascript" src="_static/js/modernizr.min.js"></script>
-  
-    
-      <script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
-        <script type="text/javascript" src="_static/jquery.js"></script>
-        <script type="text/javascript" src="_static/underscore.js"></script>
-        <script type="text/javascript" src="_static/doctools.js"></script>
-        <script type="text/javascript" src="_static/language_data.js"></script>
-    
-    <script type="text/javascript" src="_static/js/theme.js"></script>
-
-    
-
-  
-  <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
-  <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+  <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
+
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Development &mdash; Django Ditto 2.0.0 documentation</title>
+      <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+      <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
+  <!--[if lt IE 9]>
+    <script src="_static/js/html5shiv.min.js"></script>
+  <![endif]-->
+  
+        <script data-url_root="./" id="documentation_options" src="_static/documentation_options.js"></script>
+        <script src="_static/jquery.js"></script>
+        <script src="_static/underscore.js"></script>
+        <script src="_static/doctools.js"></script>
+    <script src="_static/js/theme.js"></script>
     <link rel="index" title="Index" href="genindex.html" />
     <link rel="search" title="Search" href="search.html" />
     <link rel="prev" title="Twitter" href="services/twitter.html" /> 
 </head>
 
-<body class="wy-body-for-nav">
-
-   
+<body class="wy-body-for-nav"> 
   <div class="wy-grid-for-nav">
-    
     <nav data-toggle="wy-nav-shift" class="wy-nav-side">
       <div class="wy-side-scroll">
         <div class="wy-side-nav-search" >
-          
-
-          
             <a href="index.html" class="icon icon-home"> Django Ditto
-          
-
-          
           </a>
-
-          
-            
-            
               <div class="version">
-                1.4
+                2.0
               </div>
-            
-          
-
-          
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -72,29 +38,19 @@
     <input type="hidden" name="area" value="default" />
   </form>
 </div>
-
-          
-        </div>
-
-        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
-          
-            
-            
-              
-            
-            
+        </div><div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="Navigation menu">
               <ul>
 <li class="toctree-l1"><a class="reference internal" href="introduction.html">Introduction</a></li>
 <li class="toctree-l1"><a class="reference internal" href="installation.html">Installation</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/lastfm.html">Last.fm</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/pinboard.html">Pinboard</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul class="current">
 <li class="toctree-l1 current"><a class="current reference internal" href="#">Development</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="#tests">Tests</a></li>
@@ -107,76 +63,38 @@
 </ul>
 </li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
 <li class="toctree-l1"><a class="reference external" href="https://pypi.python.org/pypi/django-ditto">Django Ditto on PyPI</a></li>
 </ul>
 
-            
-          
         </div>
       </div>
     </nav>
 
-    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
-
-      
-      <nav class="wy-nav-top" aria-label="top navigation">
-        
+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"><nav class="wy-nav-top" aria-label="Mobile navigation menu" >
           <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
           <a href="index.html">Django Ditto</a>
-        
       </nav>
 
-
       <div class="wy-nav-content">
-        
         <div class="rst-content">
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-
-
-<div role="navigation" aria-label="breadcrumbs navigation">
-
+          <div role="navigation" aria-label="Page navigation">
   <ul class="wy-breadcrumbs">
-    
-      <li><a href="index.html">Docs</a> &raquo;</li>
-        
+      <li><a href="index.html" class="icon icon-home"></a> &raquo;</li>
       <li>Development</li>
-    
-    
       <li class="wy-breadcrumbs-aside">
-        
-            
             <a href="_sources/development.rst.txt" rel="nofollow"> View page source</a>
-          
-        
       </li>
-    
   </ul>
-
-  
   <hr/>
 </div>
           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
            <div itemprop="articleBody">
-            
-  <div class="section" id="development">
-<h1>Development<a class="headerlink" href="#development" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="development">
+<h1>Development<a class="headerlink" href="#development" title="Permalink to this headline"></a></h1>
 <p>There’s a basic Django project in <code class="docutils literal notranslate"><span class="pre">devproject/</span></code> to make it easier to work on
 the app. This might be enough to get things up and running (assumes pipenv is
 installed):</p>
@@ -186,8 +104,8 @@ <h1>Development<a class="headerlink" href="#development" title="Permalink to thi
 $ pipenv run ./manage.py runserver
 </pre></div>
 </div>
-<div class="section" id="tests">
-<h2>Tests<a class="headerlink" href="#tests" title="Permalink to this headline">¶</a></h2>
+<section id="tests">
+<h2>Tests<a class="headerlink" href="#tests" title="Permalink to this headline"></a></h2>
 <p>Run tests with tox. Install it with:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ pip install tox
 </pre></div>
@@ -211,11 +129,11 @@ <h2>Tests<a class="headerlink" href="#tests" title="Permalink to this headline">
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ tox -e coverage
 </pre></div>
 </div>
-</div>
-<div class="section" id="other-notes-for-development">
-<h2>Other notes for development<a class="headerlink" href="#other-notes-for-development" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="coverage">
-<h3>Coverage<a class="headerlink" href="#coverage" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="other-notes-for-development">
+<h2>Other notes for development<a class="headerlink" href="#other-notes-for-development" title="Permalink to this headline"></a></h2>
+<section id="coverage">
+<h3>Coverage<a class="headerlink" href="#coverage" title="Permalink to this headline"></a></h3>
 <p>Using coverage.py to check test coverage:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ coverage run --source<span class="o">=</span><span class="s1">&#39;.&#39;</span> ./manage.py <span class="nb">test</span>
 $ coverage report
@@ -226,9 +144,9 @@ <h3>Coverage<a class="headerlink" href="#coverage" title="Permalink to this head
 $ open -a <span class="s2">&quot;Google Chrome&quot;</span> htmlcov/index.html
 </pre></div>
 </div>
-</div>
-<div class="section" id="documentation">
-<h3>Documentation<a class="headerlink" href="#documentation" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="documentation">
+<h3>Documentation<a class="headerlink" href="#documentation" title="Permalink to this headline"></a></h3>
 <p>You’ll need <a class="reference external" href="http://www.sphinx-doc.org/en/master/">sphinx</a> installed. You
 could do this using pipenv and the Pipfiles:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ <span class="nb">cd</span> docs
@@ -240,12 +158,12 @@ <h3>Documentation<a class="headerlink" href="#documentation" title="Permalink to
 $ pipenv run make html
 </pre></div>
 </div>
-</div>
-<div class="section" id="packaging">
-<h3>Packaging<a class="headerlink" href="#packaging" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="packaging">
+<h3>Packaging<a class="headerlink" href="#packaging" title="Permalink to this headline"></a></h3>
 <p>Set version number in <code class="docutils literal notranslate"><span class="pre">ditto/__init__.py</span></code>.</p>
 <p>Rebuild documentation (which includes the version number).</p>
-<p>Ensure <code class="docutils literal notranslate"><span class="pre">CHANGES.rst</span></code> is up-to-date for new version.</p>
+<p>Ensure <code class="docutils literal notranslate"><span class="pre">CHANGELOG.md</span></code> is up-to-date for new version.</p>
 <p>Commit changes to git.</p>
 <p>Add a version tag:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ python setup.py tag
@@ -256,55 +174,38 @@ <h3>Packaging<a class="headerlink" href="#packaging" title="Permalink to this he
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ python setup.py publish
 </pre></div>
 </div>
-</div>
-</div>
-</div>
+</section>
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+    <p>&#169; Copyright 2016, Phil Gyford.</p>
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-<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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-  <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
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+        <script src="_static/jquery.js"></script>
+        <script src="_static/underscore.js"></script>
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 <li class="toctree-l1"><a class="reference internal" href="installation.html">Installation</a></li>
 </ul>
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+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
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 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
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   <ul class="wy-breadcrumbs">
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           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
            <div itemprop="articleBody">
-            
+             
 
 <h1 id="index">Index</h1>
 
@@ -173,42 +90,30 @@ <h1 id="index">Index</h1>
 
 
            </div>
-           
           </div>
           <footer>
-  
 
   <hr/>
 
   <div role="contentinfo">
-    <p>
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+    <p>&#169; Copyright 2016, Phil Gyford.</p>
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+    provided by <a href="https://readthedocs.org">Read the Docs</a>.
+   
 
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diff --git a/docs/_build/html/index.html b/docs/_build/html/index.html
index b38c8482..d115c831 100644
--- a/docs/_build/html/index.html
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-  <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+  <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
+
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Django Ditto: Documentation &mdash; Django Ditto 2.0.0 documentation</title>
+      <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+      <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
+  <!--[if lt IE 9]>
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+        <script src="_static/underscore.js"></script>
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+    <script src="_static/js/theme.js"></script>
     <link rel="index" title="Index" href="genindex.html" />
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     <link rel="next" title="Introduction" href="introduction.html" /> 
 </head>
 
-<body class="wy-body-for-nav">
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+<body class="wy-body-for-nav"> 
   <div class="wy-grid-for-nav">
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-          
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-          
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           </a>
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+                2.0
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-          
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-          
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -72,102 +38,54 @@
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 </div>
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-        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
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 <li class="toctree-l1"><a class="reference internal" href="installation.html">Installation</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
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 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
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+          <div role="navigation" aria-label="Page navigation">
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-      <li><a href="#">Docs</a> &raquo;</li>
-        
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-    
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-
-  
   <hr/>
 </div>
           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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-            
-  <div class="section" id="django-ditto-documentation">
-<h1>Django Ditto: Documentation<a class="headerlink" href="#django-ditto-documentation" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="django-ditto-documentation">
+<h1>Django Ditto: Documentation<a class="headerlink" href="#django-ditto-documentation" title="Permalink to this headline"></a></h1>
 <p>A collection of Django apps for copying things from Flickr, Twitter and
 Pinboard, and displaying them on your Django site.</p>
 <div class="toctree-wrapper compound">
@@ -189,7 +107,7 @@ <h1>Django Ditto: Documentation<a class="headerlink" href="#django-ditto-documen
 </ul>
 </div>
 <div class="toctree-wrapper compound">
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="services/flickr.html#set-up">Set-up</a></li>
@@ -226,7 +144,7 @@ <h1>Django Ditto: Documentation<a class="headerlink" href="#django-ditto-documen
 </ul>
 </div>
 <div class="toctree-wrapper compound">
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="development.html#tests">Tests</a></li>
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 </ul>
 </div>
 <div class="toctree-wrapper compound">
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
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+    <p>&#169; Copyright 2016, Phil Gyford.</p>
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@@ -73,17 +39,7 @@
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 <li class="toctree-l1 current"><a class="current reference internal" href="#">Installation</a><ul>
@@ -101,100 +57,62 @@
 </ul>
 </li>
 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/lastfm.html">Last.fm</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/pinboard.html">Pinboard</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
 <li class="toctree-l1"><a class="reference external" href="https://pypi.python.org/pypi/django-ditto">Django Ditto on PyPI</a></li>
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           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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-            
-  <div class="section" id="installation">
-<h1>Installation<a class="headerlink" href="#installation" title="Permalink to this headline">¶</a></h1>
-<div class="section" id="pillow">
-<h2>Pillow<a class="headerlink" href="#pillow" title="Permalink to this headline">¶</a></h2>
+             
+  <section id="installation">
+<h1>Installation<a class="headerlink" href="#installation" title="Permalink to this headline"></a></h1>
+<section id="pillow">
+<h2>Pillow<a class="headerlink" href="#pillow" title="Permalink to this headline"></a></h2>
 <p>Ditto uses <a class="reference external" href="http://pillow.readthedocs.io/en/latest/">Pillow</a> which has some prerequisites of its own. You may need to install libjpeg and zlib. (On a Mac, zlib was installed for me by XCode, and I used <a class="reference external" href="http://brew.sh">Homebrew</a> to install libjpeg.)</p>
-</div>
-<div class="section" id="install-django-ditto">
-<h2>Install django-ditto<a class="headerlink" href="#install-django-ditto" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="install-django-ditto">
+<h2>Install django-ditto<a class="headerlink" href="#install-django-ditto" title="Permalink to this headline"></a></h2>
 <p>Ditto can be installed using <a class="reference external" href="https://pip.pypa.io/en/stable/">pip</a>:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ pip install django-ditto
 </pre></div>
 </div>
-</div>
-<div class="section" id="add-to-installed-apps">
-<h2>Add to INSTALLED_APPS<a class="headerlink" href="#add-to-installed-apps" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="add-to-installed-apps">
+<h2>Add to INSTALLED_APPS<a class="headerlink" href="#add-to-installed-apps" title="Permalink to this headline"></a></h2>
 <p>To use Ditto in your own project (untested as yet), add the core <code class="docutils literal notranslate"><span class="pre">ditto.core</span></code> application to your project’s <code class="docutils literal notranslate"><span class="pre">INSTALLED_APPS</span></code> in your <code class="docutils literal notranslate"><span class="pre">settings.py</span></code>, and add the applications for the services you need. This example includes Flickr, Last.fm, Pinboard and Twitter:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">INSTALLED_APPS</span> <span class="o">=</span> <span class="p">(</span>
     <span class="c1"># other apps listed here.</span>
@@ -232,12 +150,12 @@ <h2>Add to INSTALLED_APPS<a class="headerlink" href="#add-to-installed-apps" tit
 <span class="p">)</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="add-to-urls-py">
-<h2>Add to urls.py<a class="headerlink" href="#add-to-urls-py" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="add-to-urls-py">
+<h2>Add to urls.py<a class="headerlink" href="#add-to-urls-py" title="Permalink to this headline"></a></h2>
 <p>To use Ditto’s supplied views you can include each app’s URLs in your project’s own <code class="docutils literal notranslate"><span class="pre">urls.py</span></code>. Note that each app requires the correct namespace (<code class="docutils literal notranslate"><span class="pre">flickr</span></code>, <code class="docutils literal notranslate"><span class="pre">lastfm</span></code>, <code class="docutils literal notranslate"><span class="pre">pinboard</span></code> or <code class="docutils literal notranslate"><span class="pre">twitter</span></code>), eg:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">django.urls</span> <span class="k">import</span> <span class="n">include</span><span class="p">,</span> <span class="n">path</span>
-<span class="kn">from</span> <span class="nn">django.contrib</span> <span class="k">import</span> <span class="n">admin</span>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">django.urls</span> <span class="kn">import</span> <span class="n">include</span><span class="p">,</span> <span class="n">path</span>
+<span class="kn">from</span> <span class="nn">django.contrib</span> <span class="kn">import</span> <span class="n">admin</span>
 
 <span class="n">urlpatterns</span> <span class="o">=</span> <span class="p">[</span>
     <span class="n">path</span><span class="p">(</span><span class="s2">&quot;admin/&quot;</span><span class="p">,</span> <span class="n">include</span><span class="p">(</span><span class="n">admin</span><span class="o">.</span><span class="n">site</span><span class="o">.</span><span class="n">urls</span><span class="p">)),</span>
@@ -261,12 +179,12 @@ <h2>Add to urls.py<a class="headerlink" href="#add-to-urls-py" title="Permalink
 <li><p><code class="docutils literal notranslate"><span class="pre">twitter</span></code></p></li>
 <li><p><code class="docutils literal notranslate"><span class="pre">ditto</span></code> (The Ditto Core URLs)</p></li>
 </ul>
-</div>
-<div class="section" id="settings">
-<h2>Settings<a class="headerlink" href="#settings" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="settings">
+<h2>Settings<a class="headerlink" href="#settings" title="Permalink to this headline"></a></h2>
 <p>There are some optional settings that can be placed in your project’s <code class="docutils literal notranslate"><span class="pre">settings.py</span></code>.</p>
-<div class="section" id="core-settings">
-<h3>Core settings<a class="headerlink" href="#core-settings" title="Permalink to this headline">¶</a></h3>
+<section id="core-settings">
+<h3>Core settings<a class="headerlink" href="#core-settings" title="Permalink to this headline"></a></h3>
 <p>The <code class="docutils literal notranslate"><span class="pre">ditto.core</span></code> app has some optional settings for customing the formats used to display dates and times in the default templates (and the <code class="docutils literal notranslate"><span class="pre">ditto_core.display_time()</span></code> template tag). The formats are those used for <a class="reference external" href="http://strftime.org">strftime</a>. Here they are, with their default values:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1"># e.g. &quot;07:34&quot;</span>
 <span class="n">DITTO_CORE_TIME_FORMAT</span> <span class="o">=</span> <span class="s1">&#39;%H:%M&#39;</span>
@@ -289,9 +207,9 @@ <h3>Core settings<a class="headerlink" href="#core-settings" title="Permalink to
 <span class="n">DITTO_CORE_DATE_YEAR_MONTH_FORMAT</span> <span class="o">=</span> <span class="s1">&#39;%b %Y&#39;</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="service-specific-settings">
-<h3>Service-specific settings<a class="headerlink" href="#service-specific-settings" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="service-specific-settings">
+<h3>Service-specific settings<a class="headerlink" href="#service-specific-settings" title="Permalink to this headline"></a></h3>
 <p>In addition, some of the other apps have their own optional settings. They’re described in detail in each service’s documentation.</p>
 <p>This is the complete list of service-specific settings with their default values:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">DITTO_FLICKR_DIR_BASE</span> <span class="o">=</span> <span class="s1">&#39;flickr&#39;</span>
@@ -302,69 +220,51 @@ <h3>Service-specific settings<a class="headerlink" href="#service-specific-setti
 <span class="n">DITTO_TWITTER_USE_LOCAL_MEDIA</span> <span class="o">=</span> <span class="kc">False</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="other-optional-settings">
-<h3>Other optional settings<a class="headerlink" href="#other-optional-settings" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="other-optional-settings">
+<h3>Other optional settings<a class="headerlink" href="#other-optional-settings" title="Permalink to this headline"></a></h3>
 <p>To have large numbers formatted nicely in the included templates, ensure these are in your <code class="docutils literal notranslate"><span class="pre">settings.py</span></code>:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">USE_L10N</span> <span class="o">=</span> <span class="kc">True</span>
 <span class="n">USE_THOUSAND_SEPARATOR</span> <span class="o">=</span> <span class="kc">True</span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="set-up-each-service">
-<h2>Set up each service<a class="headerlink" href="#set-up-each-service" title="Permalink to this headline">¶</a></h2>
+</section>
+</section>
+<section id="set-up-each-service">
+<h2>Set up each service<a class="headerlink" href="#set-up-each-service" title="Permalink to this headline"></a></h2>
 <p>Each service (such as Flickr or Twitter) you want to use will require some set-up in order to link your account(s) on the service with Django Ditto. See the documentation for each service for how to do this.</p>
-</div>
-</div>
+</section>
+</section>
 
 
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+          <footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
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diff --git a/docs/_build/html/introduction.html b/docs/_build/html/introduction.html
index af29f441..95e9a359 100644
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+++ b/docs/_build/html/introduction.html
@@ -1,71 +1,37 @@
-
-
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-<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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-  <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+  <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
+
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Introduction &mdash; Django Ditto 2.0.0 documentation</title>
+      <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+      <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
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+    <script src="_static/js/html5shiv.min.js"></script>
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+    <script src="_static/js/theme.js"></script>
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+<body class="wy-body-for-nav"> 
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -73,17 +39,7 @@
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   </form>
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               <ul class="current">
 <li class="toctree-l1 current"><a class="current reference internal" href="#">Introduction</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="#services-covered">Services covered</a></li>
@@ -92,92 +48,54 @@
 </li>
 <li class="toctree-l1"><a class="reference internal" href="installation.html">Installation</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/lastfm.html">Last.fm</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/pinboard.html">Pinboard</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
 <li class="toctree-l1"><a class="reference external" href="https://pypi.python.org/pypi/django-ditto">Django Ditto on PyPI</a></li>
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 </div>
           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
            <div itemprop="articleBody">
-            
-  <div class="section" id="introduction">
-<h1>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="introduction">
+<h1>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline"></a></h1>
 <p>A collection of Django apps for copying things from third-party sites and services. If something doesn’t make sense, <a class="reference external" href="mailto:phil&#37;&#52;&#48;gyford&#46;com">email Phil Gyford</a> and I’ll try and clarify it.</p>
 <p>Requires Python 3.6 to 3.9, and Django 2.2 to 3.2.</p>
 <p><a class="reference external" href="https://github.com/philgyford/django-ditto/tree/main/screenshots">See screenshots of a site using the supplied templates.</a></p>
-<div class="section" id="services-covered">
-<h2>Services covered<a class="headerlink" href="#services-covered" title="Permalink to this headline">¶</a></h2>
+<section id="services-covered">
+<h2>Services covered<a class="headerlink" href="#services-covered" title="Permalink to this headline"></a></h2>
 <p>Currently, Ditto can copy these things from these services:</p>
 <ul class="simple">
 <li><dl class="simple">
@@ -220,9 +138,9 @@ <h2>Services covered<a class="headerlink" href="#services-covered" title="Permal
 <p>Public and private Photos, Bookmarks and Tweets are saved, but only public ones are used in the included Views, Templates and Template tags; non-public data are only visible in the Django admin.</p>
 <p>Ditto does not <em>sync</em> data – it’s a one-way fetch of data <em>from</em> the service <em>to</em> Ditto. You can repeatedly fetch the same Photos, Tweets, etc and their data will be overwritten in Ditto. You could do a single fetch of all your data as a snapshot/archive. And/or, after that, keep fetching the latest items to keep it up-to-date.</p>
 <p>For each item fetched, the original JSON data is saved on its object.</p>
-</div>
-<div class="section" id="what-ditto-includes">
-<h2>What Ditto includes<a class="headerlink" href="#what-ditto-includes" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="what-ditto-includes">
+<h2>What Ditto includes<a class="headerlink" href="#what-ditto-includes" title="Permalink to this headline"></a></h2>
 <p>The Ditto apps provide:</p>
 <ul class="simple">
 <li><p>Models</p></li>
@@ -237,56 +155,38 @@ <h2>What Ditto includes<a class="headerlink" href="#what-ditto-includes" title="
 <p>Or you might want to use the management commands, Models and Admin to fetch and
 store your data, but use that data in your own Views and Templates, maybe using
 the Template tags. Or some other combination.</p>
-</div>
-</div>
+</section>
+</section>
 
 
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\ No newline at end of file
diff --git a/docs/_build/html/objects.inv b/docs/_build/html/objects.inv
index 9e1c4ff0..3f4631ed 100644
--- a/docs/_build/html/objects.inv
+++ b/docs/_build/html/objects.inv
@@ -1,6 +1,5 @@
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diff --git a/docs/_build/html/search.html b/docs/_build/html/search.html
index af3500be..c1afb615 100644
--- a/docs/_build/html/search.html
+++ b/docs/_build/html/search.html
@@ -1,70 +1,37 @@
-
-
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-<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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-  
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-  <script type="text/javascript" src="_static/js/modernizr.min.js"></script>
-  
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Search &mdash; Django Ditto 2.0.0 documentation</title>
+      <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+      <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
     
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+  <!--[if lt IE 9]>
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+    <script src="_static/language_data.js"></script>
     <link rel="index" title="Index" href="genindex.html" />
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 </head>
 
-<body class="wy-body-for-nav">
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+                2.0
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 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="#" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -72,103 +39,55 @@
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 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="services/flickr.html">Flickr</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/lastfm.html">Last.fm</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/pinboard.html">Pinboard</a></li>
 <li class="toctree-l1"><a class="reference internal" href="services/twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
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-      Please activate JavaScript to enable the search
-      functionality.
+      Please activate JavaScript to enable the search functionality.
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-  
 
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+    <p>&#169; Copyright 2016, Phil Gyford.</p>
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diff --git a/docs/_build/html/searchindex.js b/docs/_build/html/searchindex.js
index dca54e35..53daead8 100644
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-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul class="current">
 <li class="toctree-l1 current"><a class="current reference internal" href="#">Flickr</a><ul>
 <li class="toctree-l2"><a class="reference internal" href="#set-up">Set-up</a></li>
@@ -119,83 +75,45 @@
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-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
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-            
-  <div class="section" id="flickr">
-<h1>Flickr<a class="headerlink" href="#flickr" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="flickr">
+<h1>Flickr<a class="headerlink" href="#flickr" title="Permalink to this headline"></a></h1>
 <p>You can fetch, store and display data about all your Photos and Photosets (Albums) for one or more <a class="reference external" href="https://flickr.com/">Flickr</a> Accounts. By default the included models and templates will link to the photo files on flickr.com, but you can also download the original files to store locally. These can then be used to generate images in all other sizes, to be served locally.  See the <a class="reference external" href="#fetch-files-media">Fetch Files management command</a> below.</p>
-<div class="section" id="set-up">
-<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline">¶</a></h2>
+<section id="set-up">
+<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline"></a></h2>
 <p>In the Django admin, create a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> in the Flickr app, and add your Flickr API key and secret from <a class="reference external" href="https://www.flickr.com/services/apps/create/apply/">https://www.flickr.com/services/apps/create/apply/</a> (you can ignore the User for the moment).</p>
 <p>By default this will only allow the fetching of fully public photos. To fetch all photos your Flickr account can access, you’ll need to do this:</p>
 <ol class="arabic">
@@ -218,9 +136,9 @@ <h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline
 </pre></div>
 </div>
 <p>Now you can download your photos’ data and, optionally, their original image/video files. See <a class="reference internal" href="#flickr-management-commands"><span class="std std-ref">Management commands</span></a>.</p>
-</div>
-<div class="section" id="models">
-<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="models">
+<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline"></a></h2>
 <p>The models available in <code class="docutils literal notranslate"><span class="pre">ditto.flickr.models</span></code> are:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Account</span></code></dt><dd><p>Representing a Flickr account that has API credentials and that we fetch Photos for. It has a one-to-one relationship with a <code class="docutils literal notranslate"><span class="pre">User</span></code> model.</p>
@@ -234,11 +152,11 @@ <h2>Models<a class="headerlink" href="#models" title="Permalink to this headline
 <dt><code class="docutils literal notranslate"><span class="pre">User</span></code></dt><dd><p>A single user on Flickr. There could be lots of Users but only one (or a few) will have associated Account objects – these are the Users we fetch Photos for.</p>
 </dd>
 </dl>
-</div>
-<div class="section" id="managers">
-<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="photos">
-<h3>Photos<a class="headerlink" href="#photos" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="managers">
+<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline"></a></h2>
+<section id="photos">
+<h3>Photos<a class="headerlink" href="#photos" title="Permalink to this headline"></a></h3>
 <p>There are several managers available for Photos. There are two main
 differentiators we want to restrict things by:</p>
 <ul class="simple">
@@ -257,29 +175,29 @@ <h3>Photos<a class="headerlink" href="#photos" title="Permalink to this headline
 </dd>
 </dl>
 <p>Of course, these can all be filtered as usual. So, if you wanted to get all the public Photos posted by a particular <code class="docutils literal notranslate"><span class="pre">User</span></code>:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.flickr.models</span> <span class="k">import</span> <span class="n">User</span><span class="p">,</span> <span class="n">Photo</span>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.flickr.models</span> <span class="kn">import</span> <span class="n">User</span><span class="p">,</span> <span class="n">Photo</span>
 
 <span class="n">user</span> <span class="o">=</span> <span class="n">User</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">nsid</span><span class="o">=</span><span class="s1">&#39;35034346050@N01&#39;</span><span class="p">)</span>
 <span class="n">photos</span> <span class="o">=</span> <span class="n">Photo</span><span class="o">.</span><span class="n">public_photo_objects</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">user</span><span class="o">=</span><span class="n">user</span><span class="p">)</span>
 </pre></div>
 </div>
 <p>NOTE: You can find a user’s NSID (the ID used by Flickr) at <a class="reference external" href="http://idgettr.com">http://idgettr.com</a></p>
-</div>
-<div class="section" id="users">
-<h3>Users<a class="headerlink" href="#users" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="users">
+<h3>Users<a class="headerlink" href="#users" title="Permalink to this headline"></a></h3>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">User.objects.all()</span></code></dt><dd><p>The default manager fetches all Users in the system.</p>
 </dd>
 <dt><code class="docutils literal notranslate"><span class="pre">User.objects_with_accounts.all()</span></code></dt><dd><p>This only gets Users that are associated with Accounts.</p>
 </dd>
 </dl>
-</div>
-</div>
-<div class="section" id="template-tags">
-<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline">¶</a></h2>
+</section>
+</section>
+<section id="template-tags">
+<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline"></a></h2>
 <p>There are three assigment template tags and one simple template tag available for displaying Photos, Photosets and information about a Photo.</p>
-<div class="section" id="annual-photo-counts">
-<h3>Annual Photo Counts<a class="headerlink" href="#annual-photo-counts" title="Permalink to this headline">¶</a></h3>
+<section id="annual-photo-counts">
+<h3>Annual Photo Counts<a class="headerlink" href="#annual-photo-counts" title="Permalink to this headline"></a></h3>
 <p>Get the number of Photos taken or uploaded per year for all or one User-with-Account. This fetches totals for all Users, by time uploaded:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_flickr</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -305,9 +223,9 @@ <h3>Annual Photo Counts<a class="headerlink" href="#annual-photo-counts" title="
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">annual_photo_counts</span> <span class="nv">nsid</span><span class="o">=</span><span class="s1">&#39;35034346050@N01&#39;</span> <span class="nv">count_by</span><span class="o">=</span><span class="s1">&#39;taken_time&#39;</span> <span class="k">as</span> <span class="nv">counts</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="day-photos">
-<h3>Day Photos<a class="headerlink" href="#day-photos" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="day-photos">
+<h3>Day Photos<a class="headerlink" href="#day-photos" title="Permalink to this headline"></a></h3>
 <p>Gets public Photos posted or taken on a particular day by any of the Users-with-Accounts. In this example, <code class="docutils literal notranslate"><span class="pre">my_date</span></code> is a <a class="reference external" href="https://docs.python.org/3.5/library/datetime.html#datetime.date">datetime.datetime.date</a> type:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_flickr</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -325,9 +243,9 @@ <h3>Day Photos<a class="headerlink" href="#day-photos" title="Permalink to this
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">day_photos</span> <span class="nv">my_date</span> <span class="nv">time</span><span class="o">=</span><span class="s1">&#39;post_time&#39;</span> <span class="nv">nsid</span><span class="o">=</span><span class="s1">&#39;35034346050@N01&#39;</span> <span class="k">as</span> <span class="nv">photos</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="photosets">
-<h3>Photosets<a class="headerlink" href="#photosets" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="photosets">
+<h3>Photosets<a class="headerlink" href="#photosets" title="Permalink to this headline"></a></h3>
 <p>Gets Photosets. By default they are by any User and only 10 are returned.</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_flickr</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -347,9 +265,9 @@ <h3>Photosets<a class="headerlink" href="#photosets" title="Permalink to this he
 <span class="cp">{%</span> <span class="k">photosets</span> <span class="nv">nsid</span><span class="o">=</span><span class="s1">&#39;35034346050@N01&#39;</span> <span class="nv">limit</span><span class="o">=</span><span class="m">300</span> <span class="k">as</span> <span class="nv">photoset_list</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="photo-license">
-<h3>Photo license<a class="headerlink" href="#photo-license" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="photo-license">
+<h3>Photo license<a class="headerlink" href="#photo-license" title="Permalink to this headline"></a></h3>
 <p>When displaying information about a <code class="docutils literal notranslate"><span class="pre">Photo</span></code> you may want to display a user-friendly version of its <code class="docutils literal notranslate"><span class="pre">license</span></code> (indicating Creative Commons level, All rights reserved, etc). This tag makes that easy. Pass it the <code class="docutils literal notranslate"><span class="pre">license</span></code> property of a <code class="docutils literal notranslate"><span class="pre">Photo</span></code> object. Here, <code class="docutils literal notranslate"><span class="pre">photo</span></code> is a <code class="docutils literal notranslate"><span class="pre">Photo</span></code> object:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_flickr</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -360,9 +278,9 @@ <h3>Photo license<a class="headerlink" href="#photo-license" title="Permalink to
 <blockquote>
 <div><p>&lt;a href=”<a class="reference external" href="https://creativecommons.org/licenses/by-nc-sa/2.0/">https://creativecommons.org/licenses/by-nc-sa/2.0/</a>” title=”More about permissions”&gt;Attribution-NonCommercial-ShareAlike License&lt;/a&gt;</p>
 </div></blockquote>
-</div>
-<div class="section" id="recent-photos">
-<h3>Recent Photos<a class="headerlink" href="#recent-photos" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="recent-photos">
+<h3>Recent Photos<a class="headerlink" href="#recent-photos" title="Permalink to this headline"></a></h3>
 <p>To display the most recent public Photos posted by any of the Users associated
 with Accounts. By default the most recent 10 are fetched:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_flickr</span> <span class="cp">%}</span><span class="x"></span>
@@ -383,20 +301,20 @@ <h3>Recent Photos<a class="headerlink" href="#recent-photos" title="Permalink to
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">recent_photos</span> <span class="nv">nsid</span><span class="o">=</span><span class="s1">&#39;35034346050@N01&#39;</span> <span class="nv">limit</span><span class="o">=</span><span class="m">5</span> <span class="k">as</span> <span class="nv">photos</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="management-commands">
-<span id="flickr-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="fetch-account-user">
-<h3>Fetch Account User<a class="headerlink" href="#fetch-account-user" title="Permalink to this headline">¶</a></h3>
+</section>
+</section>
+<section id="management-commands">
+<span id="flickr-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline"></a></h2>
+<section id="fetch-account-user">
+<h3>Fetch Account User<a class="headerlink" href="#fetch-account-user" title="Permalink to this headline"></a></h3>
 <p>This is only used when setting up a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> object with API credentials. It fetches data about the Flickr User associated with this <code class="docutils literal notranslate"><span class="pre">Account</span></code>.</p>
 <p>Once the <code class="docutils literal notranslate"><span class="pre">Account</span></code> has been created in the Django admin, and its API credentials entered, run this (using the Django ID for the object instead of <code class="docutils literal notranslate"><span class="pre">1</span></code>):</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_flickr_account_user --id<span class="o">=</span><span class="m">1</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="fetch-photos">
-<h3>Fetch Photos<a class="headerlink" href="#fetch-photos" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-photos">
+<h3>Fetch Photos<a class="headerlink" href="#fetch-photos" title="Permalink to this headline"></a></h3>
 <p>Fetches data about Photos (including videos). This will fetch data for ALL Photos for ALL Accounts:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_flickr_photos --days<span class="o">=</span>all
 </pre></div>
@@ -420,9 +338,9 @@ <h3>Fetch Photos<a class="headerlink" href="#fetch-photos" title="Permalink to t
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>/var/www/example.com/media/flickr/46/05/35034346050N01/avatars/35034346050N01.jpg
 </pre></div>
 </div>
-</div>
-<div class="section" id="fetch-originals">
-<h3>Fetch originals<a class="headerlink" href="#fetch-originals" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-originals">
+<h3>Fetch originals<a class="headerlink" href="#fetch-originals" title="Permalink to this headline"></a></h3>
 <p>The <code class="docutils literal notranslate"><span class="pre">fetch_flickr_photos</span></code> management command only fetches data <em>about</em> the photos (title, locations, EXIF, tags, etc). To download the original photo and video files themselves, use the <code class="docutils literal notranslate"><span class="pre">fetch_flickr_originals</span></code> command, <em>after</em> fetching the photos’ data:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_flickr_originals
 </pre></div>
@@ -470,9 +388,9 @@ <h3>Fetch originals<a class="headerlink" href="#fetch-originals" title="Permalin
 </div>
 <p>If you change your mind you can switch back to using the images hosted on flickr.com by removing the <code class="docutils literal notranslate"><span class="pre">DITTO_FLICKR_USE_LOCAL_MEDIA</span></code> setting or changing it to <code class="docutils literal notranslate"><span class="pre">False</span></code>.</p>
 <p>Note that Ditto currently can’t do the same for videos, even if the original video file has been downloaded. No matter what the  value of <code class="docutils literal notranslate"><span class="pre">DITTO_FLICKR_USE_LOCAL_MEDIA</span></code> the flickr.com URL for videos is always used.</p>
-</div>
-<div class="section" id="fetch-photosets">
-<h3>Fetch Photosets<a class="headerlink" href="#fetch-photosets" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-photosets">
+<h3>Fetch Photosets<a class="headerlink" href="#fetch-photosets" title="Permalink to this headline"></a></h3>
 <p>You can fetch data about your Photosets any time, but it doesn’t fetch detailed data about Photos within them.</p>
 <p>So, for best results, only run this <em>after</em> getting running <code class="docutils literal notranslate"><span class="pre">fetch_flickr_photos</span></code>.</p>
 <p>To fetch Photosets for all Accounts:</p>
@@ -483,57 +401,39 @@ <h3>Fetch Photosets<a class="headerlink" href="#fetch-photosets" title="Permalin
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_flickr_photosets --account<span class="o">=</span><span class="m">35034346050</span>@N01
 </pre></div>
 </div>
-</div>
-</div>
-</div>
+</section>
+</section>
+</section>
 
 
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diff --git a/docs/_build/html/services/lastfm.html b/docs/_build/html/services/lastfm.html
index 2ad8f452..280166bf 100644
--- a/docs/_build/html/services/lastfm.html
+++ b/docs/_build/html/services/lastfm.html
@@ -1,71 +1,37 @@
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-            
-  <div class="section" id="last-fm">
-<h1>Last.fm<a class="headerlink" href="#last-fm" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="last-fm">
+<h1>Last.fm<a class="headerlink" href="#last-fm" title="Permalink to this headline"></a></h1>
 <p>You can fetch all your Scrobbles (listens) from one or more <a class="reference external" href="https://www.last.fm/">Last.fm</a> accounts. You can then view: recent Scrobbles; the most popular Artists, Tracks and Albums (for different time periods); number of Scrobbles per year; all Scrobbles for a single day; etc.</p>
-<div class="section" id="set-up">
-<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline">¶</a></h2>
+<section id="set-up">
+<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline"></a></h2>
 <p>In the Django admin, create a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> in the Last.fm app. Enter your Last.fm username, your full name, and a Last.fm API key from <a class="reference external" href="http://www.last.fm/api/account/create">http://www.last.fm/api/account/create</a></p>
 <p>Now you can download your scrobbles. See <a class="reference internal" href="#lastfm-management-commands"><span class="std std-ref">Management commands</span></a>.</p>
-</div>
-<div class="section" id="models">
-<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="models">
+<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline"></a></h2>
 <p>The models available in <code class="docutils literal notranslate"><span class="pre">ditto.lastfm.models</span></code> are:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Account</span></code></dt><dd><p>Representing a Last.fm account with an API key.</p>
@@ -232,9 +150,9 @@ <h2>Models<a class="headerlink" href="#models" title="Permalink to this headline
 </pre></div>
 </div>
 <p>See <code class="docutils literal notranslate"><span class="pre">ditto.lastfm.models</span></code> for more useful properties and methods.</p>
-</div>
-<div class="section" id="managers">
-<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="managers">
+<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline"></a></h2>
 <p>The default manager for each of <code class="docutils literal notranslate"><span class="pre">Track</span></code>, <code class="docutils literal notranslate"><span class="pre">Album</span></code> and <code class="docutils literal notranslate"><span class="pre">Artist</span></code> has a <code class="docutils literal notranslate"><span class="pre">with_scrobble_counts()</span></code> method. This gives each returned object a <code class="docutils literal notranslate"><span class="pre">scrobble_count</span></code> property which is an aggregated count of the number of times that thing has been scrobbled. These results are also filterable by <code class="docutils literal notranslate"><span class="pre">Account</span></code>, minimum and maximum scrobble time, and (for <code class="docutils literal notranslate"><span class="pre">Track</span></code> and <code class="docutils literal notranslate"><span class="pre">Album</span></code>) by <code class="docutils literal notranslate"><span class="pre">Artist</span></code>.</p>
 <p>By default, the manager behaves as expected, eg:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1"># A QuerySet of all Track objects:</span>
@@ -275,12 +193,12 @@ <h2>Managers<a class="headerlink" href="#managers" title="Permalink to this head
                                             <span class="n">max_post_time</span><span class="o">=</span><span class="n">d2</span><span class="p">)</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="template-tags">
-<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="template-tags">
+<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline"></a></h2>
 <p>There are several template tags for getting common lists of things.</p>
-<div class="section" id="annual-scrobble-counts">
-<h3>Annual Scrobble Counts<a class="headerlink" href="#annual-scrobble-counts" title="Permalink to this headline">¶</a></h3>
+<section id="annual-scrobble-counts">
+<h3>Annual Scrobble Counts<a class="headerlink" href="#annual-scrobble-counts" title="Permalink to this headline"></a></h3>
 <p>Get the number of scrobbles per year for all or one <code class="docutils literal notranslate"><span class="pre">Account</span></code>. This fetches totals for all <code class="docutils literal notranslate"><span class="pre">Account</span></code> s:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -298,9 +216,9 @@ <h3>Annual Scrobble Counts<a class="headerlink" href="#annual-scrobble-counts" t
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">annual_scrobble_counts</span> <span class="nv">account</span><span class="o">=</span><span class="nv">account</span> <span class="k">as</span> <span class="nv">counts</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="day-scrobbles">
-<h3>Day Scrobbles<a class="headerlink" href="#day-scrobbles" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="day-scrobbles">
+<h3>Day Scrobbles<a class="headerlink" href="#day-scrobbles" title="Permalink to this headline"></a></h3>
 <p>Get a QuerySet of all Scrobbles from a particular day for one or all <code class="docutils literal notranslate"><span class="pre">Account</span></code> s, earliest first. In these examples, <code class="docutils literal notranslate"><span class="pre">today</span></code> can be either a <code class="docutils literal notranslate"><span class="pre">datetime.datetime</span></code> or a <code class="docutils literal notranslate"><span class="pre">datetime.date</span></code>.</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -318,9 +236,9 @@ <h3>Day Scrobbles<a class="headerlink" href="#day-scrobbles" title="Permalink to
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">day_scrobbles</span> <span class="nv">date</span><span class="o">=</span><span class="nv">today</span> <span class="nv">account</span><span class="o">=</span><span class="nv">account</span> <span class="k">as</span> <span class="nv">scrobbles</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="recent-scrobbles">
-<h3>Recent Scrobbles<a class="headerlink" href="#recent-scrobbles" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="recent-scrobbles">
+<h3>Recent Scrobbles<a class="headerlink" href="#recent-scrobbles" title="Permalink to this headline"></a></h3>
 <p>Get a QuerySet of the most recent Scrobbles, by one or all <code class="docutils literal notranslate"><span class="pre">Account</span></code> s.  The default quantity returned is 10.</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -333,9 +251,9 @@ <h3>Recent Scrobbles<a class="headerlink" href="#recent-scrobbles" title="Permal
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">recent_scrobbles</span> <span class="nv">account</span><span class="o">=</span><span class="nv">account</span> <span class="nv">limit</span><span class="o">=</span><span class="m">30</span> <span class="k">as</span> <span class="nv">scrobbles</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="top-tracks">
-<h3>Top Tracks<a class="headerlink" href="#top-tracks" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="top-tracks">
+<h3>Top Tracks<a class="headerlink" href="#top-tracks" title="Permalink to this headline"></a></h3>
 <p>Get a QuerySet of the most-scrobbled <code class="docutils literal notranslate"><span class="pre">Track</span></code> s with the most-scrobbled first. Can be restricted to: a single <code class="docutils literal notranslate"><span class="pre">Account</span></code>; a single day, week, month or year; tracks by a single <code class="docutils literal notranslate"><span class="pre">Artist</span></code>. By default 10 tracks are returned.</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -375,9 +293,9 @@ <h3>Top Tracks<a class="headerlink" href="#top-tracks" title="Permalink to this
 </pre></div>
 </div>
 <p>Arguments can be in any order.</p>
-</div>
-<div class="section" id="top-albums">
-<h3>Top Albums<a class="headerlink" href="#top-albums" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="top-albums">
+<h3>Top Albums<a class="headerlink" href="#top-albums" title="Permalink to this headline"></a></h3>
 <p>Get a QuerySet of the most-scrobbled <code class="docutils literal notranslate"><span class="pre">Album</span></code> s with the most-scrobbled first. This works in exactly the same way as the <code class="docutils literal notranslate"><span class="pre">top_tracks</span></code> template tag, above, with identical arguments. e.g.:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -392,9 +310,9 @@ <h3>Top Albums<a class="headerlink" href="#top-albums" title="Permalink to this
 <span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="top-artists">
-<h3>Top Artists<a class="headerlink" href="#top-artists" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="top-artists">
+<h3>Top Artists<a class="headerlink" href="#top-artists" title="Permalink to this headline"></a></h3>
 <p>Get a QuerySet of the most-scrobbled <code class="docutils literal notranslate"><span class="pre">Artist</span></code> s with the most-scrobbled first. This works in a similar way to the <code class="docutils literal notranslate"><span class="pre">top_tracks</span></code> and <code class="docutils literal notranslate"><span class="pre">top_albums</span></code> template tags, above. The only difference is that results cannot be filtered by <code class="docutils literal notranslate"><span class="pre">artist</span></code>. e.g.:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_lastfm</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -409,13 +327,13 @@ <h3>Top Artists<a class="headerlink" href="#top-artists" title="Permalink to thi
 <span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="management-commands">
-<span id="lastfm-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline">¶</a></h2>
+</section>
+</section>
+<section id="management-commands">
+<span id="lastfm-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline"></a></h2>
 <p>There is only one Last.fm management command.</p>
-<div class="section" id="fetch-scrobbles">
-<h3>Fetch Scrobbles<a class="headerlink" href="#fetch-scrobbles" title="Permalink to this headline">¶</a></h3>
+<section id="fetch-scrobbles">
+<h3>Fetch Scrobbles<a class="headerlink" href="#fetch-scrobbles" title="Permalink to this headline"></a></h3>
 <p>Fetches Scrobbles for one or all Accounts.</p>
 <p>To fetch ALL Scrobbles for all Accounts (this could take a long time):</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_lastfm_scrobbles --days<span class="o">=</span>all
@@ -431,57 +349,39 @@ <h3>Fetch Scrobbles<a class="headerlink" href="#fetch-scrobbles" title="Permalin
 </div>
 <p>It’s safe to re-fetch the same data. Duplicates will only occur if an Artist/Track/Album’s URL slug has changed. A change of case won’t cause duplicates, but anything more will.</p>
 <p>Subsequent fetches will update any other changed data, such as altered Artist names, new or different MBIDs, etc.</p>
-</div>
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+</section>
+</section>
+</section>
 
 
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+++ b/docs/_build/html/services/pinboard.html
@@ -1,71 +1,37 @@
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 <div role="search">
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@@ -73,22 +39,12 @@
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 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
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@@ -111,88 +67,50 @@
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 <li class="toctree-l1"><a class="reference internal" href="twitter.html">Twitter</a></li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="../development.html">Development</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Elsewhere</span></p>
+<p class="caption" role="heading"><span class="caption-text">Elsewhere</span></p>
 <ul>
 <li class="toctree-l1"><a class="reference external" href="https://github.com/philgyford/django-ditto">Django Ditto on GitHub</a></li>
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-    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
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-      <nav class="wy-nav-top" aria-label="top navigation">
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+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"><nav class="wy-nav-top" aria-label="Mobile navigation menu" >
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-<div role="navigation" aria-label="breadcrumbs navigation">
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+          <div role="navigation" aria-label="Page navigation">
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-      <li><a href="../index.html">Docs</a> &raquo;</li>
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+      <li><a href="../index.html" class="icon icon-home"></a> &raquo;</li>
       <li>Pinboard</li>
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 </div>
           <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
            <div itemprop="articleBody">
-            
-  <div class="section" id="pinboard">
-<h1>Pinboard<a class="headerlink" href="#pinboard" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="pinboard">
+<h1>Pinboard<a class="headerlink" href="#pinboard" title="Permalink to this headline"></a></h1>
 <p>You can fetch, store and display data about all your bookmarks for one or more <a class="reference external" href="https://pinboard.in/">Pinboard</a> accounts.</p>
-<div class="section" id="set-up">
-<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline">¶</a></h2>
+<section id="set-up">
+<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline"></a></h2>
 <p>In the Django admin, add an <code class="docutils literal notranslate"><span class="pre">Account</span></code> in the Pinboard app with your API token from <a class="reference external" href="https://pinboard.in/settings/password">https://pinboard.in/settings/password</a> .</p>
 <p>Then use the <a class="reference internal" href="#pinboard-management-commands"><span class="std std-ref">Management commands</span></a> to download your Bookmarks.</p>
-</div>
-<div class="section" id="models">
-<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="models">
+<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline"></a></h2>
 <p>The models available in <code class="docutils literal notranslate"><span class="pre">ditto.pinboard.models</span></code> are:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Account</span></code></dt><dd><p>A single Pinboard account. (Note: other services, like Twitter and Flickr, have separate <code class="docutils literal notranslate"><span class="pre">User</span></code> and <code class="docutils literal notranslate"><span class="pre">Account</span></code> models. Pinboard is currently simpler.)</p>
@@ -204,9 +122,9 @@ <h2>Models<a class="headerlink" href="#models" title="Permalink to this headline
 <dt><code class="docutils literal notranslate"><span class="pre">Bookmark</span></code></dt><dd><p>A single URL added to Pinboard by a particular Account.</p>
 </dd>
 </dl>
-</div>
-<div class="section" id="managers">
-<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="managers">
+<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline"></a></h2>
 <p><code class="docutils literal notranslate"><span class="pre">Bookmark</span></code> models have several managers:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Bookmark.objects.all()</span></code></dt><dd><p>The default manager fetches <em>all</em> Bookmarks, posted by all Accounts, whether they’re public or private.</p>
@@ -219,18 +137,18 @@ <h2>Managers<a class="headerlink" href="#managers" title="Permalink to this head
 </dd>
 </dl>
 <p>Of course, these can all be filtered as usual. So, to display public ‘To read’ Bookmarks posted by a particular Account:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.pinboard.models</span> <span class="k">import</span> <span class="n">Account</span><span class="p">,</span> <span class="n">Bookmark</span>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.pinboard.models</span> <span class="kn">import</span> <span class="n">Account</span><span class="p">,</span> <span class="n">Bookmark</span>
 
 <span class="n">account</span> <span class="o">=</span> <span class="n">Account</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">username</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span><span class="p">)</span>
 <span class="n">bookmarks</span> <span class="o">=</span> <span class="n">Bookmark</span><span class="o">.</span><span class="n">public_to_read_objects</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">account</span><span class="o">=</span><span class="n">account</span><span class="p">)</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="template-tags">
-<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="template-tags">
+<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline"></a></h2>
 <p>There are two template tags available for displaying Bookmarks in your templates.</p>
-<div class="section" id="annual-bookmark-counts">
-<h3>Annual Bookmark Counts<a class="headerlink" href="#annual-bookmark-counts" title="Permalink to this headline">¶</a></h3>
+<section id="annual-bookmark-counts">
+<h3>Annual Bookmark Counts<a class="headerlink" href="#annual-bookmark-counts" title="Permalink to this headline"></a></h3>
 <p>Get the number of bookmarks per year for all or one Account. This fetches totals for all Accounts:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_pinboard</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -248,9 +166,9 @@ <h3>Annual Bookmark Counts<a class="headerlink" href="#annual-bookmark-counts" t
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">annual_bookmark_counts</span> <span class="nv">account</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="k">as</span> <span class="nv">counts</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="day-bookmarks">
-<h3>Day Bookmarks<a class="headerlink" href="#day-bookmarks" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="day-bookmarks">
+<h3>Day Bookmarks<a class="headerlink" href="#day-bookmarks" title="Permalink to this headline"></a></h3>
 <p>To display Bookmarks posted to Pinboard on a particular day, use
 <code class="docutils literal notranslate"><span class="pre">day_bookmarks</span></code>. By default it gets Bookmarks posted by all Accounts.
 In this example, <code class="docutils literal notranslate"><span class="pre">my_date</span></code> is a <a class="reference external" href="https://docs.python.org/3.5/library/datetime.html#datetime.date">datetime.datetime.date</a> type:</p>
@@ -267,9 +185,9 @@ <h3>Day Bookmarks<a class="headerlink" href="#day-bookmarks" title="Permalink to
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">day_bookmarks</span> <span class="nv">my_date</span> <span class="nv">account</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="k">as</span> <span class="nv">bookmarks</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="recent-bookmarks">
-<h3>Recent Bookmarks<a class="headerlink" href="#recent-bookmarks" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="recent-bookmarks">
+<h3>Recent Bookmarks<a class="headerlink" href="#recent-bookmarks" title="Permalink to this headline"></a></h3>
 <p>To display the most recently-posted Bookmarks use <code class="docutils literal notranslate"><span class="pre">recent_bookmarks</span></code>. By default it gets the 10 most recent Bookmarks posted by all Accounts:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_pinboard</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -284,9 +202,9 @@ <h3>Recent Bookmarks<a class="headerlink" href="#recent-bookmarks" title="Permal
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">recent_bookmarks</span> <span class="nv">account</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="nv">limit</span><span class="o">=</span><span class="m">5</span> <span class="k">as</span> <span class="nv">bookmarks</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="popular-bookmark-tags">
-<h3>Popular Bookmark Tags<a class="headerlink" href="#popular-bookmark-tags" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="popular-bookmark-tags">
+<h3>Popular Bookmark Tags<a class="headerlink" href="#popular-bookmark-tags" title="Permalink to this headline"></a></h3>
 <p>To display the most common public Tags on public Bookmarks use
 <code class="docutils literal notranslate"><span class="pre">popular_bookmark_tags</span></code>. By default it gets the 10 Tags used most across all
 Accounts.</p>
@@ -308,14 +226,14 @@ <h3>Popular Bookmark Tags<a class="headerlink" href="#popular-bookmark-tags" tit
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">popular_bookmark_tags</span> <span class="nv">limit</span><span class="o">=</span><span class="m">5</span> <span class="k">as</span> <span class="nv">tags</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="management-commands">
-<span id="pinboard-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline">¶</a></h2>
+</section>
+</section>
+<section id="management-commands">
+<span id="pinboard-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline"></a></h2>
 <p>Once you have set up an Account with your Pinboard API token (see above), you
 can fetch Bookmarks.</p>
-<div class="section" id="fetch-bookmarks">
-<h3>Fetch Bookmarks<a class="headerlink" href="#fetch-bookmarks" title="Permalink to this headline">¶</a></h3>
+<section id="fetch-bookmarks">
+<h3>Fetch Bookmarks<a class="headerlink" href="#fetch-bookmarks" title="Permalink to this headline"></a></h3>
 <p>Import all of your bookmarks:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_pinboard_bookmarks --all
 </pre></div>
@@ -338,57 +256,39 @@ <h3>Fetch Bookmarks<a class="headerlink" href="#fetch-bookmarks" title="Permalin
 </pre></div>
 </div>
 <p>Be aware of the rate limits: <a class="reference external" href="https://pinboard.in/api/#limits">https://pinboard.in/api/#limits</a></p>
-</div>
-</div>
-</div>
+</section>
+</section>
+</section>
 
 
            </div>
-           
           </div>
-          <footer>
-  
-    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
-      
-        <a href="twitter.html" class="btn btn-neutral float-right" title="Twitter" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
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-        <a href="lastfm.html" class="btn btn-neutral float-left" title="Last.fm" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
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+          <footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
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+    <p>&#169; Copyright 2016, Phil Gyford.</p>
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+    provided by <a href="https://readthedocs.org">Read the Docs</a>.
+   
 
+</footer>
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+  </script> 
 
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diff --git a/docs/_build/html/services/twitter.html b/docs/_build/html/services/twitter.html
index 66b63000..a6981aa9 100644
--- a/docs/_build/html/services/twitter.html
+++ b/docs/_build/html/services/twitter.html
@@ -1,71 +1,37 @@
-
-
 <!DOCTYPE html>
-<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
+<html class="writer-html5" lang="en" >
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-  <meta charset="utf-8">
-  
-  <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  
-  <title>Twitter &mdash; Django Ditto 1.4.1 documentation</title>
-  
-
-  
-  
-  
-  
-
-  
-  <script type="text/javascript" src="../_static/js/modernizr.min.js"></script>
-  
-    
-      <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
-        <script type="text/javascript" src="../_static/jquery.js"></script>
-        <script type="text/javascript" src="../_static/underscore.js"></script>
-        <script type="text/javascript" src="../_static/doctools.js"></script>
-        <script type="text/javascript" src="../_static/language_data.js"></script>
-    
-    <script type="text/javascript" src="../_static/js/theme.js"></script>
-
-    
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+  <meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
+
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Twitter &mdash; Django Ditto 2.0.0 documentation</title>
+      <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
+      <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
+  <!--[if lt IE 9]>
+    <script src="../_static/js/html5shiv.min.js"></script>
+  <![endif]-->
   
-  <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
-  <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
+        <script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js"></script>
+        <script src="../_static/jquery.js"></script>
+        <script src="../_static/underscore.js"></script>
+        <script src="../_static/doctools.js"></script>
+    <script src="../_static/js/theme.js"></script>
     <link rel="index" title="Index" href="../genindex.html" />
     <link rel="search" title="Search" href="../search.html" />
     <link rel="next" title="Development" href="../development.html" />
     <link rel="prev" title="Pinboard" href="pinboard.html" /> 
 </head>
 
-<body class="wy-body-for-nav">
-
-   
+<body class="wy-body-for-nav"> 
   <div class="wy-grid-for-nav">
-    
     <nav data-toggle="wy-nav-shift" class="wy-nav-side">
       <div class="wy-side-scroll">
         <div class="wy-side-nav-search" >
-          
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-          
             <a href="../index.html" class="icon icon-home"> Django Ditto
-          
-
-          
           </a>
-
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-                1.4
+                2.0
               </div>
-            
-          
-
-          
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -73,22 +39,12 @@
     <input type="hidden" name="area" value="default" />
   </form>
 </div>
-
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-        </div>
-
-        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
-          
-            
-            
-              
-            
-            
+        </div><div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="Navigation menu">
               <ul>
 <li class="toctree-l1"><a class="reference internal" href="../introduction.html">Introduction</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../installation.html">Installation</a></li>
 </ul>
-<p class="caption"><span class="caption-text">Services supported</span></p>
+<p class="caption" role="heading"><span class="caption-text">Services supported</span></p>
 <ul class="current">
 <li class="toctree-l1"><a class="reference internal" href="flickr.html">Flickr</a></li>
 <li class="toctree-l1"><a class="reference internal" href="lastfm.html">Last.fm</a></li>
@@ -123,91 +79,54 @@
 </ul>
 </li>
 </ul>
-<p class="caption"><span class="caption-text">For Developers</span></p>
+<p class="caption" role="heading"><span class="caption-text">For Developers</span></p>
 <ul>
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-            
-  <div class="section" id="twitter">
-<h1>Twitter<a class="headerlink" href="#twitter" title="Permalink to this headline">¶</a></h1>
+             
+  <section id="twitter">
+<h1>Twitter<a class="headerlink" href="#twitter" title="Permalink to this headline"></a></h1>
 <p>You can fetch, store and display data about your own Tweets and Liked Tweets for one or more <a class="reference external" href="https://twitter.com/">Twitter</a> accounts. By default the included models and templates will link to image and video files at Twitter, but you can also download the original files to store locally. These can then be used to serve different sizes of images locally. See the <a class="reference external" href="#fetch-files-media">Fetch Files management command</a> below.</p>
-<div class="section" id="set-up">
-<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline">¶</a></h2>
-<p>Go to <a class="reference external" href="https://apps.twitter.com/">https://apps.twitter.com/</a> and create a new Application for your Twitter account. You can leave the ‘Callback URL’ field empty.</p>
-<p>When viewing the Application Settings, click ‘manage keys and access tokens’.</p>
-<p>On the next screen click the ‘Create my access token’ button.</p>
-<p>Now, go to the Django admin, and add a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> in the Twitter app. Copy the Consumer Key, Consumer Secret, Access Token and Access Token Secret from Twitter into the Django admin (ignore the other fields), and save the account. A new <code class="docutils literal notranslate"><span class="pre">User</span></code> object will be created, reflecting the Twitter user your API credentials are associated with.</p>
+<section id="set-up">
+<h2>Set-up<a class="headerlink" href="#set-up" title="Permalink to this headline"></a></h2>
+<p>Go to <a class="reference external" href="https://developer.twitter.com/portal">https://developer.twitter.com/portal</a>. You’ll need to sign up for a Developer Account, and then create a new App for your Twitter account. Note down the three credentials it says that you should note down.</p>
+<p>When viewing your App’s details, click the “Edit” button, then the “Keys and tokens” tab.</p>
+<p>In the “Access Token and Secret” section, tap the “Generate” button. Make a note of the Access Token and Access Token Secret.</p>
+<p>Django Ditto currently uses the v1.1 Twitter API rather than the latest v2. Unfortunately, accessing v1.1 requires that you apply for “Elevated” access before the API calls used will work. You can do that here: <a class="reference external" href="https://developer.twitter.com/en/portal/products/elevated">https://developer.twitter.com/en/portal/products/elevated</a> You will then need to wait for approval.</p>
+<p>Once you have that, go to the Django admin, and add a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> in the Twitter app. Copy the API Key, API Key Secret, Access Token and Access Token Secret from your Twitter App into the Django admin (ignore the other fields), and save the account. A new <code class="docutils literal notranslate"><span class="pre">User</span></code> object will be created, reflecting the Twitter user your API credentials are associated with. If it’s worked your Account should have a title like <strong>&#64;philgyford</strong> instead of a number like <strong>1</strong>.</p>
 <p>Once this is done you’ll need to import a downloaded archive of Tweets, and/or fetch Tweets from the Twitter API. See <a class="reference internal" href="#twitter-management-commands"><span class="std std-ref">Management commands</span></a> below.</p>
-</div>
-<div class="section" id="models">
-<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h2>
+</section>
+<section id="models">
+<h2>Models<a class="headerlink" href="#models" title="Permalink to this headline"></a></h2>
 <p>The models available in <code class="docutils literal notranslate"><span class="pre">ditto.twitter.models</span></code> are:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Account</span></code></dt><dd><p>Representing a Twitter account that has API credentials and that we fetch Tweets and/or Likes for. It has a one-to-one relationship with a <code class="docutils literal notranslate"><span class="pre">User</span></code> model.</p>
@@ -220,11 +139,11 @@ <h2>Models<a class="headerlink" href="#models" title="Permalink to this headline
 </dd>
 </dl>
 <p>So, you will end up with many <code class="docutils literal notranslate"><span class="pre">User</span></code> objects in the system. But only one (or a few) will be associated with <code class="docutils literal notranslate"><span class="pre">Account</span></code> objects – these are the Users for which you fetch Tweets or favorited/liked Tweets.</p>
-</div>
-<div class="section" id="managers">
-<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="media">
-<h3>Media<a class="headerlink" href="#media" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="managers">
+<h2>Managers<a class="headerlink" href="#managers" title="Permalink to this headline"></a></h2>
+<section id="media">
+<h3>Media<a class="headerlink" href="#media" title="Permalink to this headline"></a></h3>
 <p>For <code class="docutils literal notranslate"><span class="pre">Media</span></code> objects there is only the standard manager available:</p>
 <dl class="simple">
 <dt><code class="docutils literal notranslate"><span class="pre">Media.objects.all()</span></code></dt><dd><p>Fetches all <code class="docutils literal notranslate"><span class="pre">Media</span></code> objects, attached to Tweets by anyone, whether public or private.</p>
@@ -233,9 +152,9 @@ <h3>Media<a class="headerlink" href="#media" title="Permalink to this headline">
 <p>There is no concept in Twitter of a ‘private’ photo or video. The same photo
 could be posted by different public and private Twitter users. Exercise caution
 when displaying <code class="docutils literal notranslate"><span class="pre">Media</span></code> objects to public webpages.</p>
-</div>
-<div class="section" id="tweet">
-<h3>Tweet<a class="headerlink" href="#tweet" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="tweet">
+<h3>Tweet<a class="headerlink" href="#tweet" title="Permalink to this headline"></a></h3>
 <p><code class="docutils literal notranslate"><span class="pre">Tweet</span></code> models have several managers. There are two main differentiators we want to restrict things by:</p>
 <ul class="simple">
 <li><p><strong>Public vs private:</strong> Whether a Tweet was posted by a public or private Twitter user.</p></li>
@@ -257,7 +176,7 @@ <h3>Tweet<a class="headerlink" href="#tweet" title="Permalink to this headline">
 </dd>
 </dl>
 <p>Of course, these can all be filtered as usual. So, if you wanted to get all the public Tweets posted by a particular <code class="docutils literal notranslate"><span class="pre">User</span></code>:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.twitter.models</span> <span class="k">import</span> <span class="n">User</span><span class="p">,</span> <span class="n">Tweet</span>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">ditto.twitter.models</span> <span class="kn">import</span> <span class="n">User</span><span class="p">,</span> <span class="n">Tweet</span>
 
 <span class="n">user</span> <span class="o">=</span> <span class="n">User</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span><span class="p">)</span>
 <span class="n">tweets</span> <span class="o">=</span> <span class="n">Tweet</span><span class="o">.</span><span class="n">public_tweet_objects</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">user</span><span class="o">=</span><span class="n">user</span><span class="p">)</span>
@@ -267,13 +186,13 @@ <h3>Tweet<a class="headerlink" href="#tweet" title="Permalink to this headline">
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">favorites</span> <span class="o">=</span> <span class="n">Tweet</span><span class="o">.</span><span class="n">public_favorite_objects</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">user</span><span class="o">=</span><span class="n">user</span><span class="p">)</span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="template-tags">
-<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline">¶</a></h2>
+</section>
+</section>
+<section id="template-tags">
+<h2>Template tags<a class="headerlink" href="#template-tags" title="Permalink to this headline"></a></h2>
 <p>There are four assigment template tags available for displaying Tweets in your templates.</p>
-<div class="section" id="annual-favorite-counts">
-<h3>Annual Favorite Counts<a class="headerlink" href="#annual-favorite-counts" title="Permalink to this headline">¶</a></h3>
+<section id="annual-favorite-counts">
+<h3>Annual Favorite Counts<a class="headerlink" href="#annual-favorite-counts" title="Permalink to this headline"></a></h3>
 <p>Get the number of favorites per year by all or one of the non-private Users-with-Accounts (only counting public Tweets):</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -292,9 +211,9 @@ <h3>Annual Favorite Counts<a class="headerlink" href="#annual-favorite-counts" t
 </pre></div>
 </div>
 <p>NOTE: The date used is the date the Tweets were posted on, not the date on which they were favorited.</p>
-</div>
-<div class="section" id="annual-tweet-counts">
-<h3>Annual Tweet Counts<a class="headerlink" href="#annual-tweet-counts" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="annual-tweet-counts">
+<h3>Annual Tweet Counts<a class="headerlink" href="#annual-tweet-counts" title="Permalink to this headline"></a></h3>
 <p>Get the number of Tweets per year by all or one of the non-private Users-with-Accounts:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -312,9 +231,9 @@ <h3>Annual Tweet Counts<a class="headerlink" href="#annual-tweet-counts" title="
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">annual_tweet_counts</span> <span class="nv">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="k">as</span> <span class="nv">counts</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="day-favorites">
-<h3>Day Favorites<a class="headerlink" href="#day-favorites" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="day-favorites">
+<h3>Day Favorites<a class="headerlink" href="#day-favorites" title="Permalink to this headline"></a></h3>
 <p>Use this to fetch Tweets posted on a particular day by non-private Users, which
 have been favorited/liked by any of the Users-with-Accounts. Again, <code class="docutils literal notranslate"><span class="pre">my_date</span></code> is a <a class="reference external" href="https://docs.python.org/3.5/library/datetime.html#datetime.date">datetime.datetime.date</a> type:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
@@ -327,9 +246,9 @@ <h3>Day Favorites<a class="headerlink" href="#day-favorites" title="Permalink to
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">day_favorites</span> <span class="nv">my_date</span> <span class="nv">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="k">as</span> <span class="nv">favorites</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="day-tweets">
-<h3>Day Tweets<a class="headerlink" href="#day-tweets" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="day-tweets">
+<h3>Day Tweets<a class="headerlink" href="#day-tweets" title="Permalink to this headline"></a></h3>
 <p>Gets Tweets posted on a particular day by any of the non-private Users-with-Accounts. In this example, <code class="docutils literal notranslate"><span class="pre">my_date</span></code> is a <a class="reference external" href="https://docs.python.org/3.5/library/datetime.html#datetime.date">datetime.datetime.date</a> type:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -340,9 +259,9 @@ <h3>Day Tweets<a class="headerlink" href="#day-tweets" title="Permalink to this
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">day_tweets</span> <span class="nv">my_date</span> <span class="nv">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="k">as</span> <span class="nv">tweets</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="recent-favorites">
-<h3>Recent Favorites<a class="headerlink" href="#recent-favorites" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="recent-favorites">
+<h3>Recent Favorites<a class="headerlink" href="#recent-favorites" title="Permalink to this headline"></a></h3>
 <p>This works like <code class="docutils literal notranslate"><span class="pre">recent_tweets</span></code> except it only fetches Tweets favorited/liked
 by our Users-with-Accounts, which were posted by public Twitter users:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
@@ -354,9 +273,9 @@ <h3>Recent Favorites<a class="headerlink" href="#recent-favorites" title="Permal
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">recent_favorites</span> <span class="nv">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="nv">limit</span><span class="o">=</span><span class="m">5</span> <span class="k">as</span> <span class="nv">favorites</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="recent-tweets">
-<h3>Recent Tweets<a class="headerlink" href="#recent-tweets" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="recent-tweets">
+<h3>Recent Tweets<a class="headerlink" href="#recent-tweets" title="Permalink to this headline"></a></h3>
 <p>To display the most recent Tweets posted by any of the non-private Users with an API-credentialled Account. By default the most recent 10 are fetched:</p>
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">load</span> <span class="nv">ditto_twitter</span> <span class="cp">%}</span><span class="x"></span>
 
@@ -375,28 +294,33 @@ <h3>Recent Tweets<a class="headerlink" href="#recent-tweets" title="Permalink to
 <div class="highlight-django notranslate"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">recent_tweets</span> <span class="nv">screen_name</span><span class="o">=</span><span class="s1">&#39;philgyford&#39;</span> <span class="nv">limit</span><span class="o">=</span><span class="m">5</span> <span class="k">as</span> <span class="nv">tweets</span> <span class="cp">%}</span><span class="x"></span>
 </pre></div>
 </div>
-</div>
-</div>
-<div class="section" id="management-commands">
-<span id="twitter-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="import-tweets">
-<h3>Import Tweets<a class="headerlink" href="#import-tweets" title="Permalink to this headline">¶</a></h3>
-<p>If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at <a class="reference external" href="https://twitter.com/settings/account">https://twitter.com/settings/account</a> . When you’ve downloaded it, do:</p>
-<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py import_twitter_tweets --path<span class="o">=</span>/Users/phil/Downloads/12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66
+</section>
+</section>
+<section id="management-commands">
+<span id="twitter-management-commands"></span><h2>Management commands<a class="headerlink" href="#management-commands" title="Permalink to this headline"></a></h2>
+<section id="import-tweets">
+<h3>Import Tweets<a class="headerlink" href="#import-tweets" title="Permalink to this headline"></a></h3>
+<p>If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at <a class="reference external" href="https://twitter.com/settings/download_your_data">https://twitter.com/settings/download_your_data</a> . When you’ve downloaded it, do:</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py import_twitter_tweets --path<span class="o">=</span>/path/to/twitter-2022-01-31-123456abcdef
 </pre></div>
 </div>
-<p>using the correct path to the directory you’ve downloaded and unzipped (in this case, the unzipped directory is <code class="docutils literal notranslate"><span class="pre">12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66</span></code>). This will import all of the Tweets found in the archive.</p>
+<p>using the correct path to the directory you’ve downloaded and unzipped (in this case, the unzipped directory is <code class="docutils literal notranslate"><span class="pre">twitter-2022-01-031-123456abcdef</span></code>). This will import all of the Tweets found in the archive and all of the images and animated GIFs’ MP4 files (other videos aren’t currently imported).</p>
+<p><strong>NOTE:</strong> If you have an archive of data you downloaded before sometime in early 2019 it will be a different format. You can tell because the folder will contain five directories, and three files: <code class="docutils literal notranslate"><span class="pre">index.html</span></code>, <code class="docutils literal notranslate"><span class="pre">README.txt</span></code>, and <code class="docutils literal notranslate"><span class="pre">tweets.csv</span></code>. If you want to import an archive in this format add the <cite>–archive-version=v1</cite> argument:</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py import_twitter_tweets --archive-version<span class="o">=</span>v1 --path<span class="o">=</span>/path/to/123456_abcdef
+</pre></div>
 </div>
-<div class="section" id="update-tweets">
-<h3>Update Tweets<a class="headerlink" href="#update-tweets" title="Permalink to this headline">¶</a></h3>
+<p>using the correct path to the directory (in this case, the unzipped directory is <code class="docutils literal notranslate"><span class="pre">123456_abcdef</span></code>). This will import Tweet data but no images etc, because these files weren’t included in the older archive format.</p>
+</section>
+<section id="update-tweets">
+<h3>Update Tweets<a class="headerlink" href="#update-tweets" title="Permalink to this headline"></a></h3>
 <p>If you’ve imported your Tweets (above), you won’t yet have complete data about each one. To fully-populate those Tweets you should run this (replacing <code class="docutils literal notranslate"><span class="pre">philgyford</span></code> with your Twitter screen name):</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py update_twitter_tweets --account<span class="o">=</span>philgyford
 </pre></div>
 </div>
 <p>This will fetch data for up to 6,000 Tweets. If you have more than that in your archive, run it every 15 minutes to avoid rate limiting, until you’ve fetched all of the Tweets. This command will fetch data for the least-recently fetched. It’s worth running every so often in the future, to fetch the latest data (such as Retweet and Like counts).</p>
-</div>
-<div class="section" id="fetch-tweets">
-<h3>Fetch Tweets<a class="headerlink" href="#fetch-tweets" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-tweets">
+<h3>Fetch Tweets<a class="headerlink" href="#fetch-tweets" title="Permalink to this headline"></a></h3>
 <p>Periodically you’ll want to fetch the latest Tweets. This will fetch only those Tweets posted since you last fetched any:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_twitter_tweets --account<span class="o">=</span>philgyford --recent<span class="o">=</span>new
 </pre></div>
@@ -410,9 +334,9 @@ <h3>Fetch Tweets<a class="headerlink" href="#fetch-tweets" title="Permalink to t
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_twitter_tweets --recent<span class="o">=</span>new
 </pre></div>
 </div>
-</div>
-<div class="section" id="fetch-favorites">
-<h3>Fetch Favorites<a class="headerlink" href="#fetch-favorites" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-favorites">
+<h3>Fetch Favorites<a class="headerlink" href="#fetch-favorites" title="Permalink to this headline"></a></h3>
 <p>To fetch recent Tweets that all your Accounts have favorited/liked, run one of these:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_twitter_favorites --recent<span class="o">=</span>new
 $ ./manage.py fetch_twitter_favorites --recent<span class="o">=</span><span class="m">200</span>
@@ -423,9 +347,9 @@ <h3>Fetch Favorites<a class="headerlink" href="#fetch-favorites" title="Permalin
 $ ./manage.py fetch_twitter_favorites --account<span class="o">=</span>philgyford --recent<span class="o">=</span><span class="m">200</span>
 </pre></div>
 </div>
-</div>
-<div class="section" id="update-users">
-<h3>Update Users<a class="headerlink" href="#update-users" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="update-users">
+<h3>Update Users<a class="headerlink" href="#update-users" title="Permalink to this headline"></a></h3>
 <p>When a Tweet of any kind is fetched, its User data is also stored, and the User’s profile photo (avatar) is downloaded and stored in your project’s <code class="docutils literal notranslate"><span class="pre">MEDIA_ROOT</span></code> directory. You can optionally set the <code class="docutils literal notranslate"><span class="pre">DITTO_TWITTER_DIR_BASE</span></code> setting to change the location. The default is:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">DITTO_TWITTER_DIR_BASE</span> <span class="o">=</span> <span class="s1">&#39;twitter&#39;</span>
 </pre></div>
@@ -439,9 +363,9 @@ <h3>Update Users<a class="headerlink" href="#update-users" title="Permalink to t
 </pre></div>
 </div>
 <p>This requires an <code class="docutils literal notranslate"><span class="pre">account</span></code> as the data is fetched from that Twitter user’s point of view, when it comes to privacy etc.</p>
-</div>
-<div class="section" id="fetch-files-media">
-<h3>Fetch Files (Media)<a class="headerlink" href="#fetch-files-media" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-files-media">
+<h3>Fetch Files (Media)<a class="headerlink" href="#fetch-files-media" title="Permalink to this headline"></a></h3>
 <p>Fetching Tweets (whether your own or your favorites/likes) fetches all the data <em>about</em> them, but does not fetch any media files uploaded with them. There’s a separate command for fetching images and the MP4 video files created from animated GIFs. (There’s no way to fetch the videos, or original GIF files.)</p>
 <p>You <em>must</em> first download the Tweet data (above), and then you can fetch the files for all those Tweets:</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_twitter_files
@@ -495,65 +419,47 @@ <h3>Fetch Files (Media)<a class="headerlink" href="#fetch-files-media" title="Pe
 </pre></div>
 </div>
 <p>However, there’s no way to download actual videos that were uploaded to Twitter, and so Ditto will always try to use videos hosted on Twitter, no matter what the value of <code class="docutils literal notranslate"><span class="pre">DITTO_TWITTER_USE_LOCAL_MEDIA</span></code>.</p>
-</div>
-<div class="section" id="fetch-accounts">
-<h3>Fetch Accounts<a class="headerlink" href="#fetch-accounts" title="Permalink to this headline">¶</a></h3>
+</section>
+<section id="fetch-accounts">
+<h3>Fetch Accounts<a class="headerlink" href="#fetch-accounts" title="Permalink to this headline"></a></h3>
 <p><strong>Deprecated:</strong> This only needs to be used whenever a new <code class="docutils literal notranslate"><span class="pre">Account</span></code> is added to the system.  It fetches the <code class="docutils literal notranslate"><span class="pre">User</span></code> data for each <code class="docutils literal notranslate"><span class="pre">Account</span></code> that has API credentials, and associates the two objects.</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>$ ./manage.py fetch_twitter_accounts
 </pre></div>
 </div>
 <p>I don’t think this is needed now.</p>
-</div>
-</div>
-</div>
+</section>
+</section>
+</section>
 
 
            </div>
-           
           </div>
-          <footer>
-  
-    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
-      
-        <a href="../development.html" class="btn btn-neutral float-right" title="Development" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
-      
-      
-        <a href="pinboard.html" class="btn btn-neutral float-left" title="Pinboard" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
-      
+          <footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
+        <a href="pinboard.html" class="btn btn-neutral float-left" title="Pinboard" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+        <a href="../development.html" class="btn btn-neutral float-right" title="Development" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
     </div>
-  
 
   <hr/>
 
   <div role="contentinfo">
-    <p>
-        &copy; Copyright 2016, Phil Gyford
-
-    </p>
+    <p>&#169; Copyright 2016, Phil Gyford.</p>
   </div>
-  Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. 
 
-</footer>
+  Built with <a href="https://www.sphinx-doc.org/">Sphinx</a> using a
+    <a href="https://github.com/readthedocs/sphinx_rtd_theme">theme</a>
+    provided by <a href="https://readthedocs.org">Read the Docs</a>.
+   
 
+</footer>
         </div>
       </div>
-
     </section>
-
   </div>
-  
-
-
-  <script type="text/javascript">
+  <script>
       jQuery(function () {
           SphinxRtdTheme.Navigation.enable(true);
       });
-  </script>
-
-  
-  
-    
-   
+  </script> 
 
 </body>
 </html>
\ No newline at end of file
diff --git a/docs/development.rst b/docs/development.rst
index bd073734..1310c82c 100644
--- a/docs/development.rst
+++ b/docs/development.rst
@@ -98,7 +98,7 @@ Set version number in ``ditto/__init__.py``.
 
 Rebuild documentation (which includes the version number).
 
-Ensure ``CHANGES.rst`` is up-to-date for new version.
+Ensure ``CHANGELOG.md`` is up-to-date for new version.
 
 Commit changes to git.
 
diff --git a/docs/services/twitter.rst b/docs/services/twitter.rst
index 5b3854ac..7a8dc07e 100644
--- a/docs/services/twitter.rst
+++ b/docs/services/twitter.rst
@@ -8,13 +8,15 @@ You can fetch, store and display data about your own Tweets and Liked Tweets for
 Set-up
 ******
 
-Go to https://apps.twitter.com/ and create a new Application for your Twitter account. You can leave the 'Callback URL' field empty.
+Go to https://developer.twitter.com/portal. You'll need to sign up for a Developer Account, and then create a new App for your Twitter account. Note down the three credentials it says that you should note down.
 
-When viewing the Application Settings, click 'manage keys and access tokens'.
+When viewing your App's details, click the "Edit" button, then the "Keys and tokens" tab.
 
-On the next screen click the 'Create my access token' button.
+In the "Access Token and Secret" section, tap the "Generate" button. Make a note of the Access Token and Access Token Secret.
 
-Now, go to the Django admin, and add a new ``Account`` in the Twitter app. Copy the Consumer Key, Consumer Secret, Access Token and Access Token Secret from Twitter into the Django admin (ignore the other fields), and save the account. A new ``User`` object will be created, reflecting the Twitter user your API credentials are associated with.
+Django Ditto currently uses the v1.1 Twitter API rather than the latest v2. Unfortunately, accessing v1.1 requires that you apply for "Elevated" access before the API calls used will work. You can do that here: https://developer.twitter.com/en/portal/products/elevated You will then need to wait for approval.
+
+Once you have that, go to the Django admin, and add a new ``Account`` in the Twitter app. Copy the API Key, API Key Secret, Access Token and Access Token Secret from your Twitter App into the Django admin (ignore the other fields), and save the account. A new ``User`` object will be created, reflecting the Twitter user your API credentials are associated with. If it's worked your Account should have a title like **@philgyford** instead of a number like **1**.
 
 Once this is done you'll need to import a downloaded archive of Tweets, and/or fetch Tweets from the Twitter API. See :ref:`twitter-management-commands` below.
 
@@ -253,13 +255,21 @@ Management commands
 Import Tweets
 =============
 
-If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at https://twitter.com/settings/account . When you've downloaded it, do:
+If you have more than 3,200 Tweets, you can only include older Tweets by downloading your archive and importing it. To do so, request your archive at https://twitter.com/settings/download_your_data . When you've downloaded it, do:
 
 .. code-block:: shell
 
-    $ ./manage.py import_twitter_tweets --path=/Users/phil/Downloads/12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66
+    $ ./manage.py import_twitter_tweets --path=/path/to/twitter-2022-01-31-123456abcdef
+
+using the correct path to the directory you've downloaded and unzipped (in this case, the unzipped directory is ``twitter-2022-01-031-123456abcdef``). This will import all of the Tweets found in the archive and all of the images and animated GIFs' MP4 files (other videos aren't currently imported).
 
-using the correct path to the directory you've downloaded and unzipped (in this case, the unzipped directory is ``12552_dbeb4be9b8ff5f76d7d486c005cc21c9faa61f66``). This will import all of the Tweets found in the archive.
+**NOTE:** If you have an archive of data you downloaded before sometime in early 2019 it will be a different format. You can tell because the folder will contain five directories, and three files: ``index.html``, ``README.txt``, and ``tweets.csv``. If you want to import an archive in this format add the `--archive-version=v1` argument:
+
+.. code-block:: shell
+
+    $ ./manage.py import_twitter_tweets --archive-version=v1 --path=/path/to/123456_abcdef
+
+using the correct path to the directory (in this case, the unzipped directory is ``123456_abcdef``). This will import Tweet data but no images etc, because these files weren't included in the older archive format.
 
 Update Tweets
 =============
@@ -423,4 +433,3 @@ Fetch Accounts
     $ ./manage.py fetch_twitter_accounts
 
 I don't think this is needed now.
-
diff --git a/setup.py b/setup.py
index 8be7a0f1..cb7e4083 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,7 @@ def get_author_email():
     # os.system("python setup.py bdist_wheel upload")
     sys.exit()
 
-dev_require = ["django-debug-toolbar>=2.0,<4.0", "flake8>=3.8,<4.0", "black==21.7b0"]
+dev_require = ["django-debug-toolbar>=2.0,<4.0", "flake8>=3.8,<5.0", "black==22.1.0"]
 tests_require = dev_require + [
     "factory-boy>=2.12.0,<4.0",
     "freezegun>=0.3.12,<2.0",
@@ -80,18 +80,18 @@ def get_author_email():
     version=get_version(),
     packages=["ditto"],
     install_requires=[
-        "django-imagekit>=4.0,<4.1",
-        "django-sortedm2m>=3.0.0,<3.1",
-        "django-taggit>=1.2.0,<1.6",
+        "django-imagekit>=4.0,<4.2",
+        "django-sortedm2m>=3.0.0,<3.2",
+        "django-taggit>=2.0.0,<2.2",
         "flickrapi>=2.4,<2.5",
-        "pillow>=7.0.0,<9.0",
+        "pillow>=8.0.0,<10.0",
         "pytz",
         "twitter-text-python>=1.1.1,<1.2",
         "twython>=3.7.0,<3.10",
     ],
     dependency_links=[],
     tests_require=tests_require,
-    extras_require={"dev": dev_require + ["Django>=3.1,<3.3"], "test": tests_require},
+    extras_require={"dev": dev_require + ["Django>=4.0,<4.3"], "test": tests_require},
     include_package_data=True,
     license=get_license(),
     description=(
@@ -107,9 +107,8 @@ def get_author_email():
         "Development Status :: 5 - Production/Stable",
         "Environment :: Web Environment",
         "Framework :: Django",
-        "Framework :: Django :: 2.2",
-        "Framework :: Django :: 3.1",
         "Framework :: Django :: 3.2",
+        "Framework :: Django :: 4.0",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
@@ -118,6 +117,7 @@ def get_author_email():
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: Internet :: WWW/HTTP",
         "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
     ],
diff --git a/tests/core/test_views.py b/tests/core/test_views.py
index 80991656..d9d502bd 100644
--- a/tests/core/test_views.py
+++ b/tests/core/test_views.py
@@ -159,7 +159,7 @@ def test_home_no_twitter(self):
     # def test_tag_detail_templates(self):
     # "Uses the correct templates"
     # bookmark = pinboardfactories.BookmarkFactory.create()
-    # bookmark.tags.set('fish')
+    # bookmark.tags.set(['fish'])
     # response = self.client.get(reverse('ditto:tag_detail',
     # kwargs={'slug': 'fish'}))
     # self.assertEquals(response.status_code, 200)
@@ -169,11 +169,11 @@ def test_home_no_twitter(self):
     # def test_tag_detail_context(self):
     # "Sends correct data to templates"
     # bookmark_1 = pinboardfactories.BookmarkFactory.create(title='Carp')
-    # bookmark_1.tags.set('Fish', 'carp')
+    # bookmark_1.tags.set(['Fish', 'carp'])
     # bookmark_2 = pinboardfactories.BookmarkFactory.create(title='Cod')
-    # bookmark_2.tags.set('Fish', 'cod')
+    # bookmark_2.tags.set(['Fish', 'cod'])
     # bookmark_3 = pinboardfactories.BookmarkFactory.create(title='Dog')
-    # bookmark_3.tags.set('mammals', 'dog')
+    # bookmark_3.tags.set(['mammals', 'dog'])
     # response = self.client.get(reverse('ditto:tag_detail',
     # kwargs={'slug': 'fish'}))
     # self.assertTrue('tag' in response.context)
@@ -186,9 +186,9 @@ def test_home_no_twitter(self):
     # def test_tag_detail_privacy(self):
     # "Does not display private bookmarks"
     # bookmark_1 = pinboardfactories.BookmarkFactory.create(is_private=True)
-    # bookmark_1.tags.set('fish')
+    # bookmark_1.tags.set(['fish'])
     # bookmark_2 = pinboardfactories.BookmarkFactory.create(is_private=False)
-    # bookmark_2.tags.set('fish')
+    # bookmark_2.tags.set(['fish'])
     # response = self.client.get(reverse('ditto:tag_detail',
     # kwargs={'slug': 'fish'}))
     # self.assertTrue('bookmark_list' in response.context)
diff --git a/tests/pinboard/test_fetch.py b/tests/pinboard/test_fetch.py
index f4763f29..ce9e27ff 100644
--- a/tests/pinboard/test_fetch.py
+++ b/tests/pinboard/test_fetch.py
@@ -387,7 +387,7 @@ def test_update_bookmarks(self):
             description="My initial description",
             url="http://fontello.com/",
         )
-        bookmark.tags.set("initial", "tags")
+        bookmark.tags.set(["initial", "tags"])
 
         bookmarks_from_json = self.get_bookmarks_from_json()
         bookmarks_data = bookmarks_from_json["bookmarks"]
diff --git a/tests/pinboard/test_models.py b/tests/pinboard/test_models.py
index 57bb2022..5670f5b0 100644
--- a/tests/pinboard/test_models.py
+++ b/tests/pinboard/test_models.py
@@ -124,7 +124,7 @@ def test_ordering(self):
     def test_tags(self):
         "Can save and recall tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("banana", "cherry", "apple")
+        bookmark.tags.set(["banana", "cherry", "apple"])
         bookmark_reloaded = Bookmark.objects.get(pk=bookmark.pk)
         self.assertEqual(len(bookmark_reloaded.tags.all()), 3)
         self.assertIsInstance(bookmark_reloaded.tags.first(), BookmarkTag)
@@ -135,7 +135,7 @@ def test_tags(self):
     def test_tags_private(self):
         "Doesn't fetch private tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("ispublic", ".isprivate", "alsopublic")
+        bookmark.tags.set(["ispublic", ".isprivate", "alsopublic"])
         bookmark_reloaded = Bookmark.objects.get(pk=bookmark.pk)
         self.assertEqual(len(bookmark_reloaded.tags.all()), 2)
         self.assertEqual(bookmark_reloaded.tags.names().first(), "alsopublic")
@@ -145,13 +145,13 @@ def test_tags_private(self):
     def test_slugs_match_tags_true(self):
         "Returns true if a list of slugs is the same to bookmark's tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("banana", "cherry")
+        bookmark.tags.set(["banana", "cherry"])
         self.assertTrue(bookmark.slugs_match_tags(["cherry", "banana"]))
 
     def test_slugs_match_tags_false(self):
         "Returns false if a list of slugs is different to bookmark's tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("banana", "cherry")
+        bookmark.tags.set(["banana", "cherry"])
         self.assertFalse(bookmark.slugs_match_tags(["banana", "apple"]))
 
     def test_default_manager(self):
@@ -255,39 +255,39 @@ class PinboardBookmarkTagSlugsTestCase(TestCase):
 
     def test_standard(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("normal")
+        bookmark.tags.set(["normal"])
         self.assertEqual(bookmark.tags.first().slug, "normal")
 
     def test_hyphens(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("one-tag")
+        bookmark.tags.set(["one-tag"])
         self.assertEqual(bookmark.tags.first().slug, "one-tag")
 
     def test_underscores(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("one_tag")
+        bookmark.tags.set(["one_tag"])
         self.assertEqual(bookmark.tags.first().slug, "one_tag")
 
     def test_private(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set(".private")
+        bookmark.tags.set([".private"])
         self.assertEqual(bookmark.tags.first().slug, ".private")
 
     def test_capitals(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("CAPITALtags")
+        bookmark.tags.set(["CAPITALtags"])
         self.assertEqual(bookmark.tags.first().slug, "capitaltags")
 
     def test_special_characters_1(self):
         "Characters that don't change"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("!$()*:;=@[]-.^_`{|}")
+        bookmark.tags.set(["!$()*:;=@[]-.^_`{|}"])
         self.assertEqual(bookmark.tags.first().slug, "!$()*:;=@[]-.^_`{|}")
 
     def test_special_characters_2(self):
         "Characters that do change"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("#-&-'-+-/-?-\"-%-<->-\\")
+        bookmark.tags.set(["#-&-'-+-/-?-\"-%-<->-\\"])
         self.assertEqual(
             bookmark.tags.first().slug,
             "%23-%2526-%27-%252B-%252f-%3f-%22-%25-%3C-%3E-%5c",
@@ -295,26 +295,26 @@ def test_special_characters_2(self):
 
     def test_accents(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("Àddîñg-áçćèńtš-tô-Éñgłïśh-íš-śīłłÿ!")
+        bookmark.tags.set(["Àddîñg-áçćèńtš-tô-Éñgłïśh-íš-śīłłÿ!"])
         self.assertEqual(
             bookmark.tags.first().slug, "àddîñg-áçćèńtš-tô-éñgłïśh-íš-śīłłÿ!"
         )
 
     def test_musical_notes(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("♬♫♪♩")
+        bookmark.tags.set(["♬♫♪♩"])
         self.assertEqual(bookmark.tags.first().slug, "♬♫♪♩")
 
     def test_chinese(self):
         bookmark = BookmarkFactory()
-        bookmark.tags.set("美国")
+        bookmark.tags.set(["美国"])
         self.assertEqual(bookmark.tags.first().slug, "美国")
 
     @override_settings(TAGGIT_CASE_INSENSITIVE=True)
     def test_case_insensitive_tags(self):
         "Creating tags named 'dog' and 'DOG' should not create different slugs."
         bookmark = BookmarkFactory()
-        bookmark.tags.set("dog", "cat", "DOG")
+        bookmark.tags.set(["dog", "cat", "DOG"])
         self.assertEqual(
             sorted([tag.slug for tag in bookmark.tags.all()]), ["cat", "dog"]
         )
diff --git a/tests/pinboard/test_templatetags.py b/tests/pinboard/test_templatetags.py
index 288207c5..b7c2cfe6 100644
--- a/tests/pinboard/test_templatetags.py
+++ b/tests/pinboard/test_templatetags.py
@@ -127,9 +127,9 @@ class PopularBookmarkTagsTestCase(TestCase):
     def test_tags(self):
         "Contains the correct data"
         bookmark_1 = BookmarkFactory()
-        bookmark_1.tags.set("fish", "carp")
+        bookmark_1.tags.set(["fish", "carp"])
         bookmark_2 = BookmarkFactory()
-        bookmark_2.tags.set("fish", "cod")
+        bookmark_2.tags.set(["fish", "cod"])
         tags = ditto_pinboard.popular_bookmark_tags()
         self.assertEqual(len(tags), 3)
         self.assertEqual(tags[0].name, "fish")
@@ -142,9 +142,9 @@ def test_tags(self):
     def test_tags_privacy_bookmarks(self):
         "Doesn't display tags from private bookmarks"
         bookmark_1 = BookmarkFactory(is_private=True)
-        bookmark_1.tags.set("fish", "carp")
+        bookmark_1.tags.set(["fish", "carp"])
         bookmark_2 = BookmarkFactory(is_private=False)
-        bookmark_2.tags.set("fish", "cod")
+        bookmark_2.tags.set(["fish", "cod"])
         tags = ditto_pinboard.popular_bookmark_tags()
         self.assertEqual(len(tags), 2)
         self.assertEqual(tags[0].name, "fish")
@@ -155,7 +155,7 @@ def test_tags_privacy_bookmarks(self):
     def test_tags_privacy_tags(self):
         "Doesn't display private .tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("ispublic", ".notpublic", "alsopublic")
+        bookmark.tags.set(["ispublic", ".notpublic", "alsopublic"])
         tags = ditto_pinboard.popular_bookmark_tags()
         self.assertEqual(len(tags), 2)
         # Tags are ordered by popularity, so can't be sure
@@ -167,13 +167,13 @@ def test_tags_privacy_tags(self):
     def test_tags_limit_default(self):
         "It should return 10 tags by default"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11")
+        bookmark.tags.set(["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"])
         tags = ditto_pinboard.popular_bookmark_tags()
         self.assertEqual(len(tags), 10)
 
     def test_tags_limit_custom(self):
         "It should return `limit` tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("1", "2", "3", "4", "5")
+        bookmark.tags.set(["1", "2", "3", "4", "5"])
         tags = ditto_pinboard.popular_bookmark_tags(limit=3)
         self.assertEqual(len(tags), 3)
diff --git a/tests/pinboard/test_views.py b/tests/pinboard/test_views.py
index 2528204e..50a3dd3b 100644
--- a/tests/pinboard/test_views.py
+++ b/tests/pinboard/test_views.py
@@ -215,7 +215,7 @@ def test_bookmark_detail_privacy(self):
     def test_bookmark_detail_tag_privacy(self):
         "Does not display private tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("publictag", ".notpublic", "alsopublic")
+        bookmark.tags.set(["publictag", ".notpublic", "alsopublic"])
         response = self.client.get(
             reverse(
                 "pinboard:bookmark_detail",
@@ -255,9 +255,9 @@ def test_tag_list_templates(self):
     def test_tag_list_context(self):
         "Sends the correct data to templates"
         bookmark_1 = BookmarkFactory()
-        bookmark_1.tags.set("fish", "carp")
+        bookmark_1.tags.set(["fish", "carp"])
         bookmark_2 = BookmarkFactory()
-        bookmark_2.tags.set("fish", "cod")
+        bookmark_2.tags.set(["fish", "cod"])
         response = self.client.get(reverse("pinboard:tag_list"))
         self.assertIn("account_list", response.context)
         self.assertIn("tag_list", response.context)
@@ -266,9 +266,9 @@ def test_tag_list_context(self):
     def test_tag_list_privacy_bookmarks(self):
         "Doesn't display tags from private bookmarks"
         bookmark_1 = BookmarkFactory(is_private=True)
-        bookmark_1.tags.set("fish", "carp")
+        bookmark_1.tags.set(["fish", "carp"])
         bookmark_2 = BookmarkFactory(is_private=False)
-        bookmark_2.tags.set("fish", "cod")
+        bookmark_2.tags.set(["fish", "cod"])
         response = self.client.get(reverse("pinboard:tag_list"))
         self.assertEqual(len(response.context["tag_list"]), 2)
         self.assertEqual(response.context["tag_list"][0].name, "fish")
@@ -277,7 +277,7 @@ def test_tag_list_privacy_bookmarks(self):
     def test_tag_list_privacy_tags(self):
         "Doesn't display private .tags"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("ispublic", ".notpublic", "alsopublic")
+        bookmark.tags.set(["ispublic", ".notpublic", "alsopublic"])
         response = self.client.get(reverse("pinboard:tag_list"))
         self.assertEqual(len(response.context["tag_list"]), 2)
         # Tags on this page are ordered by popularity, so can't be sure
@@ -291,7 +291,7 @@ def test_tag_list_privacy_tags(self):
     def test_tag_detail_templates(self):
         "Uses the correct templates"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("fish")
+        bookmark.tags.set(["fish"])
         response = self.client.get(
             reverse("pinboard:tag_detail", kwargs={"slug": "fish"})
         )
@@ -303,11 +303,11 @@ def test_tag_detail_templates(self):
     def test_tag_detail_context(self):
         "Sends the correct data to the templates"
         bookmark_1 = BookmarkFactory(title="Carp")
-        bookmark_1.tags.set("Fish", "carp")
+        bookmark_1.tags.set(["Fish", "carp"])
         bookmark_2 = BookmarkFactory(title="Cod")
-        bookmark_2.tags.set("Fish", "cod")
+        bookmark_2.tags.set(["Fish", "cod"])
         bookmark_3 = BookmarkFactory(title="Dog")
-        bookmark_3.tags.set("mammals", "dog")
+        bookmark_3.tags.set(["mammals", "dog"])
         response = self.client.get(
             reverse("pinboard:tag_detail", kwargs={"slug": "fish"})
         )
@@ -326,7 +326,7 @@ def test_tag_detail_context(self):
     def test_tag_detail_privacy(self):
         "Does not display private bookmarks"
         bookmark = BookmarkFactory(is_private=True)
-        bookmark.tags.set("fish")
+        bookmark.tags.set(["fish"])
         response = self.client.get(
             reverse("pinboard:tag_detail", kwargs={"slug": "fish"})
         )
@@ -345,7 +345,7 @@ def test_account_tag_detail_templates(self):
         "Uses the correct templates"
         account = AccountFactory()
         bookmark = BookmarkFactory(account=account, title="Carp")
-        bookmark.tags.set("fish", "carp")
+        bookmark.tags.set(["fish", "carp"])
         response = self.client.get(
             reverse(
                 "pinboard:account_tag_detail",
@@ -362,13 +362,13 @@ def test_account_tag_detail_context(self):
         account_1 = AccountFactory()
         account_2 = AccountFactory()
         bookmarks_1 = BookmarkFactory.create_batch(3, account=account_1)
-        bookmarks_1[0].tags.set("Fish", "carp")
-        bookmarks_1[1].tags.set("Fish", "cod")
-        bookmarks_1[2].tags.set("mammals", "dog")
+        bookmarks_1[0].tags.set(["Fish", "carp"])
+        bookmarks_1[1].tags.set(["Fish", "cod"])
+        bookmarks_1[2].tags.set(["mammals", "dog"])
         bookmarks_2 = BookmarkFactory.create_batch(3, account=account_2)
-        bookmarks_2[0].tags.set("Fish", "carp")
-        bookmarks_2[1].tags.set("Fish", "cod")
-        bookmarks_2[2].tags.set("mammals", "dog")
+        bookmarks_2[0].tags.set(["Fish", "carp"])
+        bookmarks_2[1].tags.set(["Fish", "cod"])
+        bookmarks_2[2].tags.set(["mammals", "dog"])
         response = self.client.get(
             reverse(
                 "pinboard:account_tag_detail",
@@ -389,7 +389,7 @@ def test_account_tag_detail_context(self):
     def test_account_tag_detail_privacy(self):
         "Does not display private bookmarks"
         bookmark = BookmarkFactory(is_private=True)
-        bookmark.tags.set("fish")
+        bookmark.tags.set(["fish"])
         response = self.client.get(
             reverse(
                 "pinboard:account_tag_detail",
@@ -401,7 +401,7 @@ def test_account_tag_detail_privacy(self):
     def test_account_tag_detail_fails_1(self):
         "Returns a 404 if a non-existent account is requested"
         bookmark = BookmarkFactory()
-        bookmark.tags.set("fish")
+        bookmark.tags.set(["fish"])
 
         response = self.client.get(
             reverse(
@@ -415,7 +415,7 @@ def test_account_tag_detail_fails_2(self):
         "Returns a 404 if a non-existent tag is requested"
         account = AccountFactory()
         bookmark = BookmarkFactory(account=account)
-        bookmark.tags.set("fish")
+        bookmark.tags.set(["fish"])
 
         response = self.client.get(
             reverse(
diff --git a/tests/twitter/fixtures/api/tweet_with_display_text_range_str.json b/tests/twitter/fixtures/api/tweet_with_display_text_range_str.json
new file mode 100644
index 00000000..8e87021f
--- /dev/null
+++ b/tests/twitter/fixtures/api/tweet_with_display_text_range_str.json
@@ -0,0 +1,20 @@
+{
+  "retweeted": false,
+  "source": "<a href=\"http://tapbots.com/tweetbot\" rel=\"nofollow\">Tweetbot for iΟS</a>",
+  "entities": {
+    "hashtags": [],
+    "symbols": [],
+    "user_mentions": [],
+    "urls": []
+  },
+  "display_text_range": ["0", "140"],
+  "favorite_count": "6",
+  "id_str": "915152022273449987",
+  "truncated": false,
+  "retweet_count": "0",
+  "id": "915152022273449987",
+  "created_at": "Tue Oct 03 09:50:19 +0000 2017",
+  "favorited": false,
+  "full_text": "Open iPad Slack, scroll to bottom. Close Slack. Open Slack; it’s scrolled back up. Every time. Maddening. Not biggest problem in world, BUT.",
+  "lang": "en"
+}
diff --git a/tests/twitter/fixtures/api/tweet_with_entities_indices_str.json b/tests/twitter/fixtures/api/tweet_with_entities_indices_str.json
new file mode 100644
index 00000000..79e8287e
--- /dev/null
+++ b/tests/twitter/fixtures/api/tweet_with_entities_indices_str.json
@@ -0,0 +1,40 @@
+{
+  "retweeted": false,
+  "source": "<a href=\"https://tapbots.com/software/tweetbot/mac\" rel=\"nofollow\">Tweetbot for Mac</a>",
+  "entities": {
+    "hashtags": [],
+    "symbols": [],
+    "user_mentions": [
+      {
+        "name": "Terry Collier",
+        "screen_name": "terrycol",
+        "indices": ["0", "9"],
+        "id_str": "123",
+        "id": "123"
+      },
+      {
+        "name": "Bob Ferris",
+        "screen_name": "bobferris",
+        "indices": ["10", "20"],
+        "id_str": "234",
+        "id": "234"
+      }
+    ],
+    "urls": []
+  },
+  "display_text_range": [0, 142],
+  "favorite_count": "0",
+  "in_reply_to_status_id_str": "914906397061664768",
+  "id_str": "914908752482111488",
+  "in_reply_to_user_id": "123",
+  "truncated": false,
+  "retweet_count": "0",
+  "id": "914908752482111488",
+  "in_reply_to_status_id": "914906397061664768",
+  "created_at": "Mon Oct 02 17:43:39 +0000 2017",
+  "favorited": false,
+  "full_text": "@terrycol @bobferris I liked it and only thought some of it was a bit silly. But analysis beyond that is probably beyond the scope of Twitter.",
+  "lang": "en",
+  "in_reply_to_screen_name": "terrycol",
+  "in_reply_to_user_id_str": "123"
+}
diff --git a/tests/twitter/fixtures/ingest/2015_08.js b/tests/twitter/fixtures/ingest/v1/2015_08.js
similarity index 100%
rename from tests/twitter/fixtures/ingest/2015_08.js
rename to tests/twitter/fixtures/ingest/v1/2015_08.js
diff --git a/tests/twitter/fixtures/ingest/v2/account.js b/tests/twitter/fixtures/ingest/v2/account.js
new file mode 100644
index 00000000..ed9567e5
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2/account.js
@@ -0,0 +1,12 @@
+window.YTD.account.part0 = [
+  {
+    "account" : {
+      "email" : "phil@gyford.com",
+      "createdVia" : "web",
+      "username" : "philgyford",
+      "accountId" : "12552",
+      "createdAt" : "2006-11-15T16:55:59.000Z",
+      "accountDisplayName" : "Phil Gyford"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2/profile.js b/tests/twitter/fixtures/ingest/v2/profile.js
new file mode 100644
index 00000000..c3f486c3
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2/profile.js
@@ -0,0 +1,13 @@
+window.YTD.profile.part0 = [
+  {
+    "profile" : {
+      "description" : {
+        "bio" : "Creator of the Bishop of Manchester’s favourite meme // Also @samuelpepys and @todaysguardian",
+        "website" : "https://t.co/FsYzXrATit",
+        "location" : "Herefordshire, UK"
+      },
+      "avatarMediaUrl" : "https://pbs.twimg.com/profile_images/1167616130/james_200208_300x300.jpg",
+      "headerMediaUrl" : "https://pbs.twimg.com/profile_banners/12552/1603038696"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2/tweet.js b/tests/twitter/fixtures/ingest/v2/tweet.js
new file mode 100644
index 00000000..954fb1d1
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2/tweet.js
@@ -0,0 +1,68 @@
+window.YTD.tweet.part0 = [
+  {
+    "tweet" : {
+      "retweeted" : false,
+      "source" : "<a href=\"http://www.cloudhopper.com/\" rel=\"nofollow\">Twitter SMS</a>",
+      "entities" : {
+        "hashtags" : [ ],
+        "symbols" : [ ],
+        "user_mentions" : [ ],
+        "urls" : [ ]
+      },
+      "display_text_range" : [
+        "0",
+        "35"
+      ],
+      "favorite_count" : "0",
+      "id_str" : "71534",
+      "truncated" : false,
+      "retweet_count" : "0",
+      "id" : "71534",
+      "created_at" : "Fri Nov 17 16:47:58 +0000 2006",
+      "favorited" : false,
+      "full_text" : "Supermarket so bright hurt my eyes.",
+      "lang" : "en"
+    }
+  },
+  {
+    "tweet" : {
+      "retweeted" : false,
+      "source" : "<a href=\"http://tapbots.com/tweetbot\" rel=\"nofollow\">Tweetbot for iΟS</a>",
+      "entities" : {
+        "hashtags" : [ ],
+        "symbols" : [ ],
+        "user_mentions" : [
+          {
+            "name" : "Matthew Cobb",
+            "screen_name" : "matthewcobb",
+            "indices" : [
+              "0",
+              "12"
+            ],
+            "id_str" : "1524781",
+            "id" : "1524781"
+          }
+        ],
+        "urls" : [ ]
+      },
+      "display_text_range" : [
+        "0",
+        "130"
+      ],
+      "favorite_count" : "2",
+      "in_reply_to_status_id_str" : "1003248782706991104",
+      "id_str" : "1003256881891168256",
+      "in_reply_to_user_id" : "1524781",
+      "truncated" : false,
+      "retweet_count" : "0",
+      "id" : "1003256881891168256",
+      "in_reply_to_status_id" : "1003248782706991104",
+      "created_at" : "Sun Jun 03 12:47:34 +0000 2018",
+      "favorited" : false,
+      "full_text" : "@matthewcobb No, he had not been kept from the office all morning for some years. He does have a roundabout way of putting things.",
+      "lang" : "en",
+      "in_reply_to_screen_name" : "matthewcobb",
+      "in_reply_to_user_id_str" : "1524781"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2/verified.js b/tests/twitter/fixtures/ingest/v2/verified.js
new file mode 100644
index 00000000..2b0d9bd6
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2/verified.js
@@ -0,0 +1,8 @@
+window.YTD.verified.part0 = [
+  {
+    "verified" : {
+      "accountId" : "12552",
+      "verified" : false
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_no_tweets/account.js b/tests/twitter/fixtures/ingest/v2_no_tweets/account.js
new file mode 100644
index 00000000..ed9567e5
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_no_tweets/account.js
@@ -0,0 +1,12 @@
+window.YTD.account.part0 = [
+  {
+    "account" : {
+      "email" : "phil@gyford.com",
+      "createdVia" : "web",
+      "username" : "philgyford",
+      "accountId" : "12552",
+      "createdAt" : "2006-11-15T16:55:59.000Z",
+      "accountDisplayName" : "Phil Gyford"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_no_tweets/profile.js b/tests/twitter/fixtures/ingest/v2_no_tweets/profile.js
new file mode 100644
index 00000000..c3f486c3
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_no_tweets/profile.js
@@ -0,0 +1,13 @@
+window.YTD.profile.part0 = [
+  {
+    "profile" : {
+      "description" : {
+        "bio" : "Creator of the Bishop of Manchester’s favourite meme // Also @samuelpepys and @todaysguardian",
+        "website" : "https://t.co/FsYzXrATit",
+        "location" : "Herefordshire, UK"
+      },
+      "avatarMediaUrl" : "https://pbs.twimg.com/profile_images/1167616130/james_200208_300x300.jpg",
+      "headerMediaUrl" : "https://pbs.twimg.com/profile_banners/12552/1603038696"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_no_tweets/tweet.js b/tests/twitter/fixtures/ingest/v2_no_tweets/tweet.js
new file mode 100644
index 00000000..0e92333f
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_no_tweets/tweet.js
@@ -0,0 +1,2 @@
+window.YTD.tweet.part0 = [
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_no_tweets/verified.js b/tests/twitter/fixtures/ingest/v2_no_tweets/verified.js
new file mode 100644
index 00000000..2b0d9bd6
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_no_tweets/verified.js
@@ -0,0 +1,8 @@
+window.YTD.verified.part0 = [
+  {
+    "verified" : {
+      "accountId" : "12552",
+      "verified" : false
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/account.js b/tests/twitter/fixtures/ingest/v2_with_media/account.js
new file mode 100644
index 00000000..ed9567e5
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_with_media/account.js
@@ -0,0 +1,12 @@
+window.YTD.account.part0 = [
+  {
+    "account" : {
+      "email" : "phil@gyford.com",
+      "createdVia" : "web",
+      "username" : "philgyford",
+      "accountId" : "12552",
+      "createdAt" : "2006-11-15T16:55:59.000Z",
+      "accountDisplayName" : "Phil Gyford"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/profile.js b/tests/twitter/fixtures/ingest/v2_with_media/profile.js
new file mode 100644
index 00000000..c3f486c3
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_with_media/profile.js
@@ -0,0 +1,13 @@
+window.YTD.profile.part0 = [
+  {
+    "profile" : {
+      "description" : {
+        "bio" : "Creator of the Bishop of Manchester’s favourite meme // Also @samuelpepys and @todaysguardian",
+        "website" : "https://t.co/FsYzXrATit",
+        "location" : "Herefordshire, UK"
+      },
+      "avatarMediaUrl" : "https://pbs.twimg.com/profile_images/1167616130/james_200208_300x300.jpg",
+      "headerMediaUrl" : "https://pbs.twimg.com/profile_banners/12552/1603038696"
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/tweet.js b/tests/twitter/fixtures/ingest/v2_with_media/tweet.js
new file mode 100644
index 00000000..4209cb36
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_with_media/tweet.js
@@ -0,0 +1,243 @@
+window.YTD.tweet.part0 = [
+  {
+     "tweet" : {
+       "retweeted" : false,
+       "source" : "<a href=\"https://tapbots.com/software/tweetbot/mac\" rel=\"nofollow\">Tweetbot for Mac</a>",
+       "entities" : {
+         "user_mentions" : [ ],
+         "urls" : [
+           {
+             "url" : "https://t.co/piSTKg40ct",
+             "expanded_url" : "http://Dropbox.com",
+             "display_url" : "Dropbox.com",
+             "indices" : [
+               "109",
+               "132"
+             ]
+           }
+         ],
+         "symbols" : [ ],
+         "media" : [
+           {
+             "expanded_url" : "https://twitter.com/philgyford/status/1247471193357275137/photo/1",
+             "indices" : [
+               "237",
+               "260"
+             ],
+             "url" : "https://t.co/DcKCkNekxp",
+             "media_url" : "http://pbs.twimg.com/tweet_video_thumb/EU_oaKjWkAAj6Gv.jpg",
+             "id_str" : "1247471158011793408",
+             "id" : "1247471158011793408",
+             "media_url_https" : "https://pbs.twimg.com/tweet_video_thumb/EU_oaKjWkAAj6Gv.jpg",
+             "sizes" : {
+               "small" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               },
+               "thumb" : {
+                 "w" : "150",
+                 "h" : "150",
+                 "resize" : "crop"
+               },
+               "medium" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               },
+               "large" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               }
+             },
+             "type" : "photo",
+             "display_url" : "pic.twitter.com/DcKCkNekxp"
+           }
+         ],
+         "hashtags" : [ ]
+       },
+       "display_text_range" : [
+         "0",
+         "260"
+       ],
+       "favorite_count" : "1",
+       "id_str" : "1247471193357275137",
+       "truncated" : false,
+       "retweet_count" : "0",
+       "id" : "1247471193357275137",
+       "possibly_sensitive" : false,
+       "created_at" : "Tue Apr 07 10:28:04 +0000 2020",
+       "favorited" : false,
+       "full_text" : "The good thing is that once I've finished the laborious process of downloading 39 separate shared folders on https://t.co/piSTKg40ct, the day can           only get better.\n\nThe weirdly-changing top-level navigation is the least confusing aspect. https://t.co/DcKCkNekxp",
+       "lang" : "en",
+       "extended_entities" : {
+         "media" : [
+           {
+             "expanded_url" : "https://twitter.com/philgyford/status/1247471193357275137/photo/1",
+             "indices" : [
+               "237",
+               "260"
+             ],
+             "url" : "https://t.co/DcKCkNekxp",
+             "media_url" : "http://pbs.twimg.com/tweet_video_thumb/EU_oaKjWkAAj6Gv.jpg",
+             "id_str" : "1247471158011793408",
+             "video_info" : {
+               "aspect_ratio" : [
+                 "25",
+                 "33"
+               ],
+               "variants" : [
+                 {
+                   "bitrate" : "0",
+                   "content_type" : "video/mp4",
+                   "url" : "https://video.twimg.com/tweet_video/EU_oaKjWkAAj6Gv.mp4"
+                 }
+               ]
+             },
+             "id" : "1247471158011793408",
+             "media_url_https" : "https://pbs.twimg.com/tweet_video_thumb/EU_oaKjWkAAj6Gv.jpg",
+             "sizes" : {
+               "small" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               },
+               "thumb" : {
+                 "w" : "150",
+                 "h" : "150",
+                 "resize" : "crop"
+               },
+               "medium" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               },
+               "large" : {
+                 "w" : "250",
+                 "h" : "330",
+                 "resize" : "fit"
+               }
+             },
+             "type" : "animated_gif",
+             "display_url" : "pic.twitter.com/DcKCkNekxp"
+           }
+         ]
+       }
+     }
+   },
+   {
+     "tweet" : {
+       "retweeted" : false,
+       "source" : "<a href=\"http://twitter.com/#!/download/ipad\" rel=\"nofollow\">Twitter for iPad</a>",
+       "entities" : {
+         "user_mentions" : [ ],
+         "urls" : [
+           {
+             "url" : "https://t.co/6hPhxAcr9n",
+             "expanded_url" : "https://twitter.com/peterme/status/1358811736464191488",
+             "display_url" : "twitter.com/peterme/status…",
+             "indices" : [
+               "179",
+               "202"
+             ]
+           }
+         ],
+         "symbols" : [ ],
+         "media" : [
+           {
+             "expanded_url" : "https://twitter.com/philgyford/status/1359135226161750021/photo/1",
+             "indices" : [
+               "203",
+               "226"
+             ],
+             "url" : "https://t.co/0tWLxyETsw",
+             "media_url" : "http://pbs.twimg.com/media/EtyeQ0FWYAEQDqk.jpg",
+             "id_str" : "1359135199255224321",
+             "id" : "1359135199255224321",
+             "media_url_https" : "https://pbs.twimg.com/media/EtyeQ0FWYAEQDqk.jpg",
+             "sizes" : {
+               "large" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               },
+               "thumb" : {
+                 "w" : "150",
+                 "h" : "150",
+                 "resize" : "crop"
+               },
+               "medium" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               },
+               "small" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               }
+             },
+             "type" : "photo",
+             "display_url" : "pic.twitter.com/0tWLxyETsw"
+           }
+         ],
+         "hashtags" : [ ]
+       },
+       "display_text_range" : [
+         "0",
+         "226"
+       ],
+       "favorite_count" : "3",
+       "id_str" : "1359135226161750021",
+       "truncated" : false,
+       "retweet_count" : "0",
+       "id" : "1359135226161750021",
+       "possibly_sensitive" : false,
+       "created_at" : "Tue Feb 09 13:41:04 +0000 2021",
+       "favorited" : false,
+       "full_text" : "I don’t know why I’d reveal my age when mentioning this anyway, but I think it was QS Defender, at my friend Simon’s. He had a 16K RAM Pack, if you         can imagine such extravagance. https://t.co/6hPhxAcr9n https://t.co/0tWLxyETsw",
+       "lang" : "en",
+       "extended_entities" : {
+         "media" : [
+           {
+             "expanded_url" : "https://twitter.com/philgyford/status/1359135226161750021/photo/1",
+             "indices" : [
+               "203",
+               "226"
+             ],
+             "url" : "https://t.co/0tWLxyETsw",
+             "media_url" : "http://pbs.twimg.com/media/EtyeQ0FWYAEQDqk.jpg",
+             "id_str" : "1359135199255224321",
+             "id" : "1359135199255224321",
+             "media_url_https" : "https://pbs.twimg.com/media/EtyeQ0FWYAEQDqk.jpg",
+             "sizes" : {
+               "large" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               },
+               "thumb" : {
+                 "w" : "150",
+                 "h" : "150",
+                 "resize" : "crop"
+               },
+               "medium" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               },
+               "small" : {
+                 "w" : "248",
+                 "h" : "256",
+                 "resize" : "fit"
+               }
+             },
+             "type" : "photo",
+             "display_url" : "pic.twitter.com/0tWLxyETsw"
+           }
+         ]
+       }
+     }
+   }
+]
\ No newline at end of file
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1247471193357275137-EU_oaKjWkAAj6Gv.mp4 b/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1247471193357275137-EU_oaKjWkAAj6Gv.mp4
new file mode 100644
index 00000000..b9aa006e
Binary files /dev/null and b/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1247471193357275137-EU_oaKjWkAAj6Gv.mp4 differ
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1359135226161750021-EtyeQ0FWYAEQDqk.jpg b/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1359135226161750021-EtyeQ0FWYAEQDqk.jpg
new file mode 100644
index 00000000..4393be5b
Binary files /dev/null and b/tests/twitter/fixtures/ingest/v2_with_media/tweet_media/1359135226161750021-EtyeQ0FWYAEQDqk.jpg differ
diff --git a/tests/twitter/fixtures/ingest/v2_with_media/verified.js b/tests/twitter/fixtures/ingest/v2_with_media/verified.js
new file mode 100644
index 00000000..2b0d9bd6
--- /dev/null
+++ b/tests/twitter/fixtures/ingest/v2_with_media/verified.js
@@ -0,0 +1,8 @@
+window.YTD.verified.part0 = [
+  {
+    "verified" : {
+      "accountId" : "12552",
+      "verified" : false
+    }
+  }
+]
\ No newline at end of file
diff --git a/tests/twitter/test_ingest.py b/tests/twitter/test_ingest_v1.py
similarity index 85%
rename from tests/twitter/test_ingest.py
rename to tests/twitter/test_ingest_v1.py
index 2e31cb52..6302dbb6 100644
--- a/tests/twitter/test_ingest.py
+++ b/tests/twitter/test_ingest_v1.py
@@ -1,17 +1,16 @@
-# coding: utf-8
 from unittest.mock import call, mock_open, patch
 
 from django.test import TestCase
 
 from ditto.twitter import factories
-from ditto.twitter.ingest import IngestError, TweetIngester
+from ditto.twitter.ingest import IngestError, Version1TweetIngester
 from ditto.twitter.models import Tweet
 
 
-class TweetIngesterTestCase(TestCase):
+class Version1TweetIngesterTestCase(TestCase):
 
     # A sample file of the format we'd get in a Twitter archive.
-    ingest_fixture = "tests/twitter/fixtures/ingest/2015_08.js"
+    ingest_fixture = "tests/twitter/fixtures/ingest/v1/2015_08.js"
 
     def get_tweet_data(self):
         "Returns the JSON tweet data, as text, from the fixture."
@@ -23,14 +22,14 @@ def get_tweet_data(self):
     def test_raises_error_with_invalid_dir(self):
         with patch("os.path.isdir", return_value=False):
             with self.assertRaises(IngestError):
-                TweetIngester().ingest(directory="/bad/dir")
+                Version1TweetIngester().ingest(directory="/bad/dir")
 
     def test_raises_error_with_empty_dir(self):
         "If no .js files are found, raises IngestError"
         with patch("os.path.isdir", return_value=True):
-            with patch("ditto.twitter.ingest.TweetIngester", file_count=0):
+            with patch("ditto.twitter.ingest.Version1TweetIngester", file_count=0):
                 with self.assertRaises(IngestError):
-                    TweetIngester().ingest(directory="/bad/dir")
+                    Version1TweetIngester().ingest(directory="/bad/dir")
 
     # All the below have a similar structure to mock out file-related functions.
     # Here's what's happening:
@@ -56,7 +55,7 @@ def test_raises_error_with_empty_dir(self):
 
     # Ingest! This will save Tweets using our fixture data, and imagine it's
     # loaded data from our fake files:
-    #           result = TweetIngester().ingest(directory='/good/dir')
+    #           result = Version1TweetIngester().ingest(directory='/good/dir')
 
     def test_opens_all_files(self):
         "All the .js files in the directory are opened."
@@ -71,7 +70,7 @@ def test_opens_all_files(self):
             m = mock_open(read_data=file_content)
             with patch("builtins.open", m):
                 m.return_value.readlines.return_value = file_content.splitlines()
-                ingester = TweetIngester()
+                ingester = Version1TweetIngester()
                 ingester.ingest(directory="/good/dir")
         m.assert_has_calls(
             [
@@ -91,7 +90,7 @@ def test_saves_all_tweets(self):
             m = mock_open(read_data=file_content)
             with patch("builtins.open", m):
                 m.return_value.readlines.return_value = file_content.splitlines()
-                TweetIngester().ingest(directory="/good/dir")
+                Version1TweetIngester().ingest(directory="/good/dir")
         # We load three dummy files; our results have three tweets in each:
         self.assertEqual(Tweet.objects.count(), 3)
 
@@ -103,7 +102,7 @@ def test_returns_correctly_on_success(self):
             m = mock_open(read_data=file_content)
             with patch("builtins.open", m):
                 m.return_value.readlines.return_value = file_content.splitlines()
-                result = TweetIngester().ingest(directory="/good/dir")
+                result = Version1TweetIngester().ingest(directory="/good/dir")
         self.assertTrue(result["success"])
         self.assertEqual(result["tweets"], 3)
         self.assertEqual(result["files"], 1)
@@ -116,7 +115,7 @@ def test_returns_correctly_on_success_no_tweets(self):
             m = mock_open(read_data=file_content)
             with patch("builtins.open", m):
                 m.return_value.readlines.return_value = file_content.splitlines()
-                result = TweetIngester().ingest(directory="/good/dir")
+                result = Version1TweetIngester().ingest(directory="/good/dir")
         self.assertFalse(result["success"])
         self.assertEqual(result["tweets"], 0)
         self.assertEqual(result["files"], 1)
diff --git a/tests/twitter/test_ingest_v2.py b/tests/twitter/test_ingest_v2.py
new file mode 100644
index 00000000..ca4dabc5
--- /dev/null
+++ b/tests/twitter/test_ingest_v2.py
@@ -0,0 +1,117 @@
+import json
+import os
+
+from django.test import TestCase
+
+from ditto.twitter.ingest import Version2TweetIngester
+from ditto.twitter.models import Tweet, User
+
+
+# e.g. /path/to/django-ditto/tests/twitter/fixtures/ingest
+FIXTURES_DIR = os.path.join(
+    os.path.dirname(os.path.abspath(__file__)), "fixtures", "ingest"
+)
+FIXTURES_DIR_WITH_TWEETS = os.path.join(FIXTURES_DIR, "v2")
+FIXTURES_DIR_NO_TWEETS = os.path.join(FIXTURES_DIR, "v2_no_tweets")
+FIXTURES_DIR_WITH_MEDIA = os.path.join(FIXTURES_DIR, "v2_with_media")
+
+
+class Version2TweetIngesterTestCase(TestCase):
+    def test_saves_all_tweets(self):
+        "Saves the tweets to the DB"
+        ingester = Version2TweetIngester()
+        ingester.ingest(directory=FIXTURES_DIR_WITH_TWEETS)
+        self.assertEqual(Tweet.objects.count(), 2)
+
+    def test_associates_tweets_with_user(self):
+        """The tweets should be associated with the user data
+        We should check, given it's all got from separate files.
+        """
+        ingester = Version2TweetIngester()
+        ingester.ingest(directory=FIXTURES_DIR_WITH_TWEETS)
+
+        tweet = Tweet.objects.first()
+        user = User.objects.first()
+
+        self.assertEqual(tweet.user, user)
+
+    def test_saves_user_data(self):
+        "Saves data about the user in each tweet's json"
+        ingester = Version2TweetIngester()
+        ingester.ingest(directory=FIXTURES_DIR_WITH_TWEETS)
+
+        user = User.objects.get(twitter_id=12552)
+        raw = json.loads(user.raw)
+
+        self.assertEqual(
+            raw,
+            {
+                "id": 12552,
+                "id_str": "12552",
+                "screen_name": "philgyford",
+                "name": "Phil Gyford",
+                "profile_image_url_https": "https://pbs.twimg.com/profile_images/1167616130/james_200208_300x300.jpg",  # NOQA: E501
+                "verified": False,
+                "ditto_note": (
+                    "This user data was compiled from separate parts of a "
+                    "downloaded twitter archive by Django Ditto"
+                ),
+            },
+        )
+
+    def test_saves_user_object(self):
+        "Saves the user object correctly"
+        ingester = Version2TweetIngester()
+        ingester.ingest(directory=FIXTURES_DIR_WITH_TWEETS)
+
+        user = User.objects.get(twitter_id=12552)
+        self.assertEqual(user.screen_name, "philgyford")
+        self.assertEqual(user.is_private, False)
+
+    def test_imports_media_files(self):
+        "It should create Media objects and import their files"
+        ingester = Version2TweetIngester()
+        ingester.ingest(directory=FIXTURES_DIR_WITH_MEDIA)
+
+        # animated_gif
+        tweet = Tweet.objects.get(twitter_id=1247471193357275137)
+        media = tweet.media.first()
+        self.assertEqual(media.media_type, "animated_gif")
+        self.assertEqual(media.mp4_file.name, "twitter/media/j6/Gv/EU_oaKjWkAAj6Gv.mp4")
+        self.assertTrue(os.path.isfile(media.mp4_file.path))
+
+        # image
+        tweet = Tweet.objects.get(twitter_id=1359135226161750021)
+        media = tweet.media.first()
+        self.assertEqual(media.media_type, "photo")
+        self.assertEqual(
+            media.image_file.name, "twitter/media/QD/qk/EtyeQ0FWYAEQDqk.jpg"
+        )
+        self.assertTrue(os.path.isfile(media.image_file.path))
+
+    def test_returns_correctly_on_success(self):
+        "After successfully importing tweets, returns correct data"
+        ingester = Version2TweetIngester()
+        result = ingester.ingest(directory=FIXTURES_DIR_WITH_TWEETS)
+        self.assertTrue(result["success"])
+        self.assertEqual(result["tweets"], 2)
+        self.assertEqual(result["files"], 1)
+        self.assertEqual(result["media"], 0)
+
+    def test_returns_correctly_on_success_no_tweets(self):
+        "No exceptions, but no tweets were imported; is correct data returned?"
+        ingester = Version2TweetIngester()
+        result = ingester.ingest(directory=FIXTURES_DIR_NO_TWEETS)
+        self.assertFalse(result["success"])
+        self.assertEqual(result["tweets"], 0)
+        self.assertEqual(result["files"], 1)
+        self.assertEqual(result["media"], 0)
+        self.assertEqual(result["messages"][0], "No tweets were found")
+
+    def test_returns_correctly_on_success_with_media_files(self):
+        ingester = Version2TweetIngester()
+        result = ingester.ingest(directory=FIXTURES_DIR_WITH_MEDIA)
+        self.assertTrue(result["success"])
+        self.assertEqual(result["tweets"], 2)
+        self.assertEqual(result["files"], 1)
+        self.assertEqual(result["media"], 2)
diff --git a/tests/twitter/test_management_commands.py b/tests/twitter/test_management_commands.py
index 1391fa36..952af429 100644
--- a/tests/twitter/test_management_commands.py
+++ b/tests/twitter/test_management_commands.py
@@ -217,9 +217,32 @@ def test_error_output(self):
 
 
 class ImportTweets(TestCase):
+    "Testing failures that aren't specific to v1 or v2 archive-version."
+
+    def setUp(self):
+        self.out = StringIO()
+        self.out_err = StringIO()
+
+    def test_fails_with_no_args(self):
+        "Fails when no arguments are provided"
+        with self.assertRaises(CommandError):
+            call_command("import_twitter_tweets")
+
+    def test_fails_with_invalid_version(self):
+        with self.assertRaises(CommandError):
+            call_command(
+                "import_twitter_tweets", path="/right/path", archive_version="nope"
+            )
+
+
+class ImportTweetsVersion1(TestCase):
+    """Only testing using --archive-version=v1 argument
+    Leaving lots of more generat tests to the ImportTweetsVersion2 class.
+    """
+
     def setUp(self):
         self.patcher = patch(
-            "ditto.twitter.management.commands.import_twitter_tweets.TweetIngester.ingest"  # noqa: E501
+            "ditto.twitter.management.commands.import_twitter_tweets.Version1TweetIngester.ingest"  # noqa: E501
         )
         self.ingest_mock = self.patcher.start()
         self.out = StringIO()
@@ -228,44 +251,93 @@ def setUp(self):
     def tearDown(self):
         self.patcher.stop()
 
-    def test_fails_with_no_args(self):
-        "Fails when no arguments are provided"
-        with self.assertRaises(CommandError):
-            call_command("import_twitter_tweets")
+    def test_calls_ingest_method(self):
+        "Calls correct class and method"
+        with patch("os.path.isdir", return_value=True):
+            call_command(
+                "import_twitter_tweets",
+                path="/right/path",
+                archive_version="v1",
+                stdout=self.out,
+            )
+            self.ingest_mock.assert_called_once_with(
+                directory="/right/path/data/js/tweets"
+            )
+
+
+class ImportTweetsVersion2(TestCase):
+    """Only testing using --archive-version=v2 argument"""
+
+    def setUp(self):
+        self.patcher = patch(
+            "ditto.twitter.management.commands.import_twitter_tweets.Version2TweetIngester.ingest"  # noqa: E501
+        )
+        self.ingest_mock = self.patcher.start()
+        self.out = StringIO()
+        self.out_err = StringIO()
+
+    def tearDown(self):
+        self.patcher.stop()
 
     def test_fails_with_invalid_directory(self):
+        "Test fails with invalid directory"
         with patch("os.path.isdir", return_value=False):
             with self.assertRaises(CommandError):
-                call_command("import_twitter_tweets", path="/wrong/path")
+                call_command(
+                    "import_twitter_tweets", path="/wrong/path", archive_version="v2"
+                )
 
     def test_calls_ingest_method(self):
+        "Calls correct class and method"
         with patch("os.path.isdir", return_value=True):
-            call_command("import_twitter_tweets", path="/right/path", stdout=self.out)
-            self.ingest_mock.assert_called_once_with(
-                directory="/right/path/data/js/tweets"
+            call_command(
+                "import_twitter_tweets",
+                path="/right/path",
+                archive_version="v2",
+                stdout=self.out,
             )
+            self.ingest_mock.assert_called_once_with(directory="/right/path/data")
 
     def test_success_output(self):
-        """Outputs the correct response if ingesting succeeds."""
-        self.ingest_mock.return_value = {"success": True, "tweets": 12345, "files": 21}
+        """Outputs the correct response if ingesting succeeds"""
+        self.ingest_mock.return_value = {
+            "success": True,
+            "tweets": 12345,
+            "files": 1,
+            "media": 345,
+        }
         with patch("os.path.isdir", return_value=True):
-            call_command("import_twitter_tweets", path="/right/path", stdout=self.out)
-            self.assertIn("Imported 12345 tweets from 21 files", self.out.getvalue())
+            call_command(
+                "import_twitter_tweets",
+                path="/right/path",
+                archive_version="v2",
+                stdout=self.out,
+            )
+            self.assertIn(
+                "Imported 12345 tweets from 1 file, and 345 media files",
+                self.out.getvalue(),
+            )
 
     def test_success_output_verbosity_0(self):
-        """Outputs nothing if ingesting succeeds."""
-        self.ingest_mock.return_value = {"success": True, "tweets": 12345, "files": 21}
+        """Outputs nothing if ingesting succeeds"""
+        self.ingest_mock.return_value = {
+            "success": True,
+            "tweets": 12345,
+            "files": 1,
+            "media": 345,
+        }
         with patch("os.path.isdir", return_value=True):
             call_command(
                 "import_twitter_tweets",
                 path="/right/path",
+                archive_version="v2",
                 verbosity=0,
                 stdout=self.out,
             )
             self.assertEqual("", self.out.getvalue())
 
     def test_error_output(self):
-        """Outputs the correct error if ingesting fails."""
+        """Outputs the correct error if ingesting fails"""
         self.ingest_mock.return_value = {
             "success": False,
             "messages": ["Something went wrong"],
@@ -274,6 +346,7 @@ def test_error_output(self):
             call_command(
                 "import_twitter_tweets",
                 path="/right/path",
+                archive_version="v2",
                 stdout=self.out,
                 stderr=self.out_err,
             )
diff --git a/tests/twitter/test_utils.py b/tests/twitter/test_utils.py
index 05b37e4e..dee77010 100644
--- a/tests/twitter/test_utils.py
+++ b/tests/twitter/test_utils.py
@@ -31,7 +31,7 @@ def test_htmlify_description(self):
                 '#testing</a> <a href="http://www.gyford.com" rel="external">'
                 'gyford.com</a> $IBM <a href="https://twitter.com/search?q=%23test">'
                 '#test</a> <a href="https://twitter.com/philgyford">@philgyford</a>'
-            )
+            ),
         )
 
 
@@ -53,7 +53,7 @@ def test_links_urls(self):
             (
                 'and <a href="http://www.wired.com/2015/10/meet-walking-dead-hp-'
                 'cisco-dell-emc-ibm-oracle/" rel="external">wired.com/2015/10/'
-                'meet-w…</a>'
+                "meet-w…</a>"
             )
             in tweet_html
         )
@@ -84,7 +84,7 @@ def test_links_users_with_entities(self):
         self.assertEqual(
             (
                 '<a href="https://twitter.com/genmon" rel="external">'
-                '@genmon</a> lovely, on my way.'
+                "@genmon</a> lovely, on my way."
             ),
             tweet_html,
         )
@@ -114,7 +114,7 @@ def test_links_substringed_hashtags(self):
         tweet_html = htmlify_tweet(self.getJson(api_fixture))
         self.assertTrue(
             (
-                '@denisewilton</a> '
+                "@denisewilton</a> "
                 '<a href="https://twitter.com/search?q=%23LOVEWHATYOUDO" '
                 'rel="external">#LOVEWHATYOUDO</a> '
                 '<a href="https://twitter.com/search?q=%23DOWHATYOULOVE" '
@@ -129,13 +129,13 @@ def test_links_symbols(self):
         self.assertEqual(
             tweet_html,
             (
-                'Some symbols: '
+                "Some symbols: "
                 '<a href="https://twitter.com/search?q=%24AAPL" rel="external">'
-                '$AAPL</a> and '
+                "$AAPL</a> and "
                 '<a href="https://twitter.com/search?q=%24PEP" rel="external">'
-                '$PEP</a> and $ANOTHER and '
+                "$PEP</a> and $ANOTHER and "
                 '<a href="https://twitter.com/search?q=%24A" rel="external">$A</a>.'
-            )
+            ),
         )
 
 
@@ -160,6 +160,48 @@ def test_strip(self):
         self.assertEqual("Y", tweet_html[-1])
 
 
+class HtmlifyTweetStrsNotIntsTestCase(HtmlifyTestCase):
+    def test_handles_display_text_range_str(self):
+        """Cope correctly if display_text_range is strings, not ints.
+
+        Some tweet JSON have the display_text_range set as strings not ints,
+        e.g. ["0", "140"] rather than [0, 140]. Particularly when the
+        JSON has come from the downloaded Twitter archive.
+        It should be able to cope with that.
+        """
+        api_fixture = "tweet_with_display_text_range_str.json"
+        tweet_html = htmlify_tweet(self.getJson(api_fixture))
+        self.assertEqual(
+            tweet_html,
+            (
+                "Open iPad Slack, scroll to bottom. Close Slack. Open Slack; it’s "
+                "scrolled back up. Every time. Maddening. Not biggest problem in "
+                "world, BUT."
+            ),
+        )
+
+    def test_handles_entities_indicies_str(self):
+        """Cope correctly if entities' indicies are strings, not ints.
+
+        Some tweet JSON have the ["entities"][<kind>]["indices"] set as
+        strings not ints, e.g. ["0", "9"] rather than [0, 9].
+        Particularly when the JSON has come from the downloaded Twitter
+        archive.
+        It should be able to cope with that.
+        """
+        api_fixture = "tweet_with_entities_indices_str.json"
+        tweet_html = htmlify_tweet(self.getJson(api_fixture))
+        self.assertEqual(
+            tweet_html,
+            (
+                '<a href="https://twitter.com/terrycol" rel="external">@terrycol</a> '
+                '<a href="https://twitter.com/bobferris" rel="external">@bobferris</a> '
+                "I liked it and only thought some of it was a bit silly. But analysis "
+                "beyond that is probably beyond the scope of Twitter."
+            ),
+        )
+
+
 class HtmlifyTweetUrlsTestCase(HtmlifyTestCase):
     "Further tests for specific problems with URLs."
 
@@ -173,11 +215,11 @@ def test_urls_in_archived_tweets(self):
         self.assertEqual(
             tweet_html,
             (
-                'Made a little Twitter thing: '
+                "Made a little Twitter thing: "
                 '<a href="http://www.gyford.com/phil/writing/2006/12/02/'
                 'quick_twitter.php">'
-                'http://www.gyford.com/phil/writing/2006/12/02/quick_twitter.php</a>'
-            )
+                "http://www.gyford.com/phil/writing/2006/12/02/quick_twitter.php</a>"
+            ),
         )
 
     def test_urls_with_no_media(self):
diff --git a/tox.ini b/tox.ini
index 93c6356a..e02a39a7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,10 +3,11 @@
 minversion = 1.8
 
 envlist =
-    py36-django{22,31,32}
-    py37-django{22,31,32}
-    py38-django{22,31,32}
-    py39-django{22,31,32}
+    py36-django{32}
+    py37-django{32}
+    py38-django{32,40}
+    py39-django{32,40}
+    py310-django{32,40}
     flake8
 
 [gh-actions]
@@ -16,13 +17,13 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
 
 [gh-actions:env]
 ; Maps GitHub Actions DJANGO version env var to tox env vars:
 DJANGO =
-    2.2: django22
-    3.1: django31
-    3.0: django32
+    3.2: django32
+    4.0: django40
 
 ; Dependencies and ENV things we need for all environments:
 [base]
@@ -34,9 +35,8 @@ setenv =
 
 [testenv]
 deps =
-    django22: Django >= 2.2, < 2.3
-    django31: Django >= 3.1, < 3.2
-    django32: Django >= 3.1, < 3.3
+    django32: Django >= 3.2, < 3.3
+    django40: Django >= 4.0, < 4.1
 extras =
     {[base]extras}
 setenv =