Notification of string changes

Author: Damyon Wiese
MDL-43856 MathJax: Improvements to the MathJax filter
* Remove all traces of mathjax from the atto equation editor - it is filter agnostic
* Add a M.core.event module for core events that can be published/subscribed to by plugins (loose coupling)
* Add a FILTER_CONTENT_UPDATED event so plugins can tell the filter system when nodes are added to the page
* Implement a listener for this event in the MathJax filter
* Fire this event from the equation editor and from the glossary filter
* Add a nolink tag to the mathjax filter, so equations will not be processed by the other filters
* Add a smarter throttle function to the equation editor preview updates (Y.throttle is dumb)


http://git.moodle.org/gw?p=moodle.git;a=commit;h=cc90cedc856153358cdc8852f46bc32d83897d04
http://github.com/moodle/moodle/commit/cc90cedc856153358cdc8852f46bc32d83897d04

+ 2.7 en [httpsurl,filter_mathjaxloader]
+ 2.7 en [texfiltercompatibility,filter_mathjaxloader]
+ 2.7 en [texfiltercompatibility_help,filter_mathjaxloader]
+ 2.7 en [localinstall_help,filter_mathjaxloader]
+ 2.7 en [mathjaxsettings_desc,filter_mathjaxloader]