OO-1784: scale the width and height of the images which are wider as the A4 page of the word document

OO-1761: more fix to the copy of course element within a course, copy or import of a course with a project broker element

OO-1770, OO-1769: allow pseudonym and guest posts, refactor the message model to hold only threads or messages of a unique thread in memory, minimize the number of joins on query, minimize the number of queries on peekview, remove buggy docking feature...

OO-1774: use a delete statement for reservations instead of remove to prevent exception if the reservation was already deleted

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