 1. Update doc/changes.rst
 2. Bump version in colorspacious/_version.py
 3. git clean -xdn
 4. git clean -xdf
 5. python setup.py sdist bdist_wheel
 6. twine upload dist/*
 7. git tag v{...}
 8. git push --tags
 9. Go to github, make a "release" (this triggers zenodo)
10. Bump version again by adding +dev
11. Go to
     https://zenodo.org/account/settings/github/repository/njsmith/colorspacious
    to get the release info.
    Click the "DOI: ..." link, then click the blue DOI badge to get
    the ReST markup, then add it to changes.rst
12. Commit, push.
