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-1593: return more informations on score evalutation, add a specific persistent assessable course node, fix selenium tests and unit tests

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

OO-1706: allow bulk download of individual tasks with only assignment or submission, rename the directory of the downloaded archive for individual tasks

OO-1606: close asap the database connection in the QTIPreWarm executor, remove some unused spring dependencies as Eclipse Mars detect them

OO-1604: fix the red screen, fix the stupid warning, wording for the editors, create the tasklist object by import and copy of courses

OO-991: fix an issue with enable/disable in tabbedpane component, add embedded editor for tasks / solutions, add author / uploader in a lot of places, wording for relatives dates in workflow

OO-991: add some cancel buttons, show the choosed tasks in the list of coached groups and identities and other fixes

OO-991: implements relative dates for assignment, submission and solution due dates, enhance the reminders rules engine to support them