OO-2172: refactor the spring configuration to be more Spring 4 friendly, remove the cycle generate by the properties injection, deployment of course and user in a separate module

OO-1616: refactore the informations panel for Hibernate with infos about database connections, sortable and downloadable tables for queries and entities

OO-1362: make the guest login, links for guests and invitation login configurable in the administration GUI

OO-1343: add three different style choices to catalog, refactor the catalog admin, refactor the image pipeline of the catalog to reduce the number of scaling

OO-1263: refactor user tools to include print, search, imprint, chat and helper, use only the off canvas menu...

OO-911, OO-912: implements the course node triggered buttons in assessment tool, implement bulk upload for tasks with selection of a group if needed

OO-592: remove tx manager annotations scanner, move configurations in resources/serviceconfig to java/... where they are needed, use import instead of the *Context.xml which allow deployment on weblogic and some others small fixes