OO-3055, OO-3047: implementation of taxonomy module with new site, full text search, webdav access, REST API...

OO-3024: Tab favorites in the course node "task". Download of all documents of the favorited participants.

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

OO-2998 make attribute translator configurable, fix problem with course condition editor and session inspector view

OO-2955: add an additional supervisor notification date field in roll call, implements some REST methods to retrieve and manipulate this data

OO-2897: implement last modification per user role (as participant or as coach), aggregate the values on structure nodes

OO-2906: submit if pushed to the next step by due date, log the number of documents by submissions in the task

OO-2878: add attachment to the info messsages, add the possibility to send the emails only to owners, coaches or participants and not all of them

OO-2947: Option to keep/delete user properties when Shibboleth delivers null and ensure that the mandatory user properties never deleted

OO-2911, OO-2912: enhance the notifications for the task/group task to check the different dates, wording, subscriptions date chooser show the date user for the list notifications and not today