Steps for Preparing a Release

1. Increment the version number in __init__.py.
2. Update the release notes in docs/release_notes.rst.
3. Update the version in docs/conf.py.
4. Ensure the release notes in the documentation have the current date as the release date.
5. Create a git tag (format X.Y.Z).
6. Run tox.
7. git push
8. python setup.py sdist upload