Add/black and PR #27

[vsoch]

This will add black lint formatting (and a test for it) along with bumping the date in docstrings, regenerating the python docs, adding the version to the changelog, and integrating the changes in PR 27.

[vsoch]

For future folks, the version of black does matter (and I didn't have the same version locally). The one used now in the CI installed by conda is:

$ pip install black==19.3b0

[vsoch]

phew, finally! The tests were using an app with django and nginx that requires compiling nginx, and instead I switched to a much simpler deployment of a webserver.