* drop some of the init lines that don't appear to work/be needed
* only load MathJax.js through ResourceLoader; let MathJax's loader handle the rest
This gets us working in Chrome, where previously we hadn't initialized correctly. Should also help in IE, still needs testing.
Will probably want to swap in the pre-minimized versions of the files at some point, but the expanded ones are fine at this stage of work.
* Pulled in MathJax 1.1 (minus the 112 megabytes of PNG "fonts")
* Pulled in some of <https://en.wikipedia.org/wiki/User:Nageh/mathJax> bits for initialization
This doesn't currently override PNG images, but does replace the text-form if you configure it.
