OO-1593: use a composite id instead of the responseIdentifier in the GUI, this will allow to show the response of the user and the solution of the same interaction side by side

OO-1819: add param for inital author, add param to not set the initial author, return more infos for course members

OO-1768: make a complete create course method which don't use and don't need to lock on the database for a new course

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

OO-1616: reduce the number of double call to the repository entry with the manager and after with the course

OO-1645,OO-1595: refactor the personal configuration of calendars, the datamodel of imported calendars, make the description visible and editable...

OO-1615: springuifie mail package, rest package, question pool module... remove unused dependencies...