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Change-Id: I23f1c7848e9388af6002aa150b19c6a479093992
Math 2.0

* MathML support with SVG fallback
* Distinction between inline and display-style
* MathJax now available independent of the rendering mode
* Debug functionality
* independent of the file-system
* backwards compatible, without dependencies to it
* removes dependencies to math specific core functions
** getMathOptions()
** armourMath
* Asynchronous generation of Math images
* upgrade to MathJax 2.3, use the unpacked version and remove unusued files
* use MediaWiki's resource loader for Javascript files
* improve the way MathJax is configured
* make math fonts available as Web fonts for native MathML
* The MathML/SVG output is used as a preview while MathJax is processing
* new table (mathoid) enables quick migration from Math1.0 to Math 2.0
 (no schema change for math table required)

MathML is currently displayed for Firefox and MathPlayer users only.
By default it is wrapped in a hidden span or div element.

SVG generation is done by using MathJax on the server-side.

(See a live demo http://math-test2.instance-proxy.wmflabs.org/wiki/Fourier_series)

PS31: Adresses the displaystyle concern of Frédéric (http://math-test2.instance-proxy.wmflabs.org/wiki/Displaystyle)
and the ID feature request of Gabriel Wicke (http://math-test2.instance-proxy.wmflabs.org/wiki/IDs#eq.20-sim)

PS35: Add extra cache keys.

PS49: Edit merge conflicts with I9066f6b2606044412a9b91ca395e841550d7e787

Change-Id: I5132901ed2072c6af7b9ed82d267200d64c67939
Merge branch 'math2.0' into dev

Conflicts:
	MathLaTeXML.php
	tests/MathLaTeXMLTest.php

Change-Id: I37571f03288cf05e367b6a93c89ae3b8567f0392