Rename for jsfiddle.
local MathJax & JQuery (ubuntu libjs-mathjax & libjs-jquery packages)
simpler posCmp()
WIP: simplify re-rendering on cursorActivity by marking the un-rendered range when cursor enters a formula.
Doesn't work: it seems "clear" is not emitted on a range?
Merge branch 'gh-pages' of https://github.com/cben/CodeMirror-MathJax