http://www.sphinx-doc.org/en/stable/tutorial.html
https://github.com/rtfd/sphinx_rtd_theme
https://github.com/rtfd/sphinx_rtd_theme#configuration
Access keys are cool. Use them! https://www.w3schools.com/tags/att_global_accesskey.asp
https://bitbucket.org/klorenz/sphinxcontrib-findanything
http://www.sphinx-doc.org/en/stable/markdown.html
http://blog.readthedocs.com/adding-markdown-support/
http://www.sphinx-doc.org/en/stable/ext/thirdparty.html
http://www.sphinx-doc.org/en/stable/templating.html Sphinx theme: https://github.com/rtfd/sphinx_rtd_theme/tree/master/sphinx_rtd_theme