OO-983: implements images for catalog, with crop tool, remove dependency to o'reilly servlet library, refactor calendar upload to use the standard FileElement (FlexiForm), use Base64 encoder of XStream (unit tested against infinispan encode, can after use the impl of JDK 8)...

OO-984: add media mapper for description, objectives, credits, requirements, refactor long to int conversion in quota, remove some used parameters for the rich text element

OO-763: don't use the container as reference for collection of components but an interface instead, break the inheritence of Panel and flatted it

OO-941: clean up event's id before sending them to fullcalendar, and update the equals methods to match the cleaned up ids

OO-852: fix an issue with return files and the wizard, wording, german, english and french translations

OO-852: implements the new bulk assessment wizard, move the task executor and scheduler in the services package

OO-798, OO-797, OO-796: update the webdav implementation based on Tomcat, make OpenOLAt work under root context, small refactoring of the dispatchers, push raw files dispatcher to its own servlet, implements Digest authentication...

OO-822: add recurrent events in full calendar, add translation in date picker (patch S. Clemenz + moving translation key to date picker, don't duplicate code from ICAlCalendarManager but move the methods to CalendarUtils)

CL-232: allow creation of course with title, shortTitle and RepositoryEntry displayName as parameters