Add local development and release instructions

CONTRIBUTING.md

@@ -0,0 +1,27 @@
+# Contributing
+
+## Install
+
+To make changes to this project, first clone this repository:
+
+```sh
+git clone [email protected]:torchbox/buckup.git
+cd buckup
+```
+
+With your preferred virtualenv activated, install testing dependencies:
+
+```sh
+pip install -e .
+```
+
+## Releases
+
+First make sure to update the version number in `setup.cfg` and the CHANGELOG. Then,
+
+```sh
+pip install wheel twine
+rm -rf dist/*
+python setup.py sdist bdist_wheel
+twine upload dist/*
+```