Enable tex on entire website

[lisa-wm]

Tex can be used within quizdown environments enclosed in single dollar signs. The same does not work on the remaining page; enabling mathjax and using double dollar signs as required by mathjax, however, leads the quizzes to crash.

[jakob-r]

Partly solved here: jakob-r/courseTheme@7a8097f

Please note:

If you want to use mathjax in quizdown you have to set mathjax: false in YAML header and you cannot use mathjax in other parts of the document :(

[jakob-r]

Should be completely solved with: jakob-r/courseTheme@83398a2