OO-3037: remove null in a first loop and sync in a second loop, add unit test which simulate the case

OO-3032: make the configuration of MathJax configurable and modify initialization script (patch D. Haag)

OO-3021: open a new paragraph for DIV and for QTI 2.1 trim the text buffer before P and DIV to remove special blank characters

OO-3019: import QTI 2.1 assessment test as QtiWorks one and mark them as QtiWorks in the test and sel test course elements

OO-3019: import QTI 2.1 assessment test as QtWorks one in self test course element like in test element

OO-3007: reverse the match method for the numerical input in statistics and archive to match the XML of the assessment items

OO-2997: don't set margin of image with size like 28x30 (default by IE), give a real name to images...

OO-2975: delete imported calendar after course, group and user deletion, implement a check every 10 runs to remove deprecated imported calendar, append the job to the scheduler

OO-2968: fill the title and short title independently of the assessment informations, add a fallback solution to the list to show the course title instead an empty title