Notification of string changes

Author: Damyon Wiese
MDL-32895: Improvements to assignment upgrade tool for large numbers of assignments.
* Form to control the perpage variable for the upgradable assignments table.
* Set timeout and increase memory limit for batch upgrades
* Output/renderer pages to the upgrade progress is progressively displayed
* Cleanup of relative includes in assignmentupgrade tool
* More verbose errors reported for failed upgrades


http://git.moodle.org/gw?p=moodle.git;a=commit;h=5b12114476e42f16b8dc0ee535687ad40b8bc252
http://github.com/moodle/moodle/commit/5b12114476e42f16b8dc0ee535687ad40b8bc252

+ 2.3 en [assignmentsperpage,tool_assignmentupgrade]
+ 2.3 en [updatetable,tool_assignmentupgrade]
+ 2.3 en [upgradeprogress,tool_assignmentupgrade]