Sg/calc angles (#50)

* Add angle code

* Finish angle code

* Add tests back in

* Change hole angles to interior

* Fix angle docs

* Add multipoints

* Update doc manifest

* Update makedocs keywords

* Add documenter source code to gitignore

* Update comment examples to find error

* More comment example fixes

* More document fixes

.gitignore

@@ -1,3 +1,4 @@
 /Manifest.toml
 /docs/build/
+/docs/src/source/
 .vscode/