Enabled requriements.txt for RTD.
Added back some of the mock modules.
Trying to handle math formatting.
Added extra header for MathJax macros.
Tried to get layout override working. Followed advice at
rtfd/readthedocs.org#152.
Forgot {{ super() }}.
Inherited from the wrong file.
Fixed very minor typo breaking math typesetting.
Merge pull request #8 from csferrie/fix-docs

Fixed math typesetting in documentation