MDL-40478 JavaScript: Support loading of YUI submodules in the yui-loader
MDL-40424 user: Incorrect use of named parameters
MDL-40701 mod_assignment: fix refresh events

It was getting the cm event with the wrong id and calling
deprecated functions
MDL-35851 Lesson: Check/fix the page order every time the pages are loaded
MDL-25500 Generic plugin based locking framework for cron (and more).
MDL-25502: Added "black magic" task allocator for cron
MDL-25503: Add step to cron to run all scheduled tasks
MDL-25504 cron: Convert cleanups to scheduled tasks