This makes it so vcs_support passes flake8 without 0 errors. Sent as PR because it is 3:45am and I am not certain I didn't muck something up.
Tests pass, played with it locally, merging.
Bump sphinx-rtd-theme dependency for builder
Include 'Fix toctree issue caused by Sphinx singlehtml builder (#367)' (rtfd#2398 (comment))