Support for MathJax

[seba-1511]

First of all, thanks a lot for this project. It looks great, and is quite useful.

I was wondering if it would be possible to add support for MathJax, together with KaTex. Although being a bit slower, MathJax would allow to render any equation.

Best,
Séb

[tatetian]

I try to maintain this project with a minimal effort. So I won't make changes actively. I would like to accept PRs that can use MathJax as an alternative backend for pseudocode.js.

[ZJUGuoShuai]

@seba-1511 @tatetian I made a try on PR #12

[SaswatPadhi]

PR #12 has finally been merged :)