Removing license.txt already added it in the root and inside the "documentation" folder
Fixing login error messages
Cosmetic changes
Adding c_id in track_* and session_rel_course and session_rel_course_rel_user tables see BT#5638
Adding middlewares to set course permissions in global.inc
Fixing queries due recent changes in the DB see BT#5638
Fixing draggable question
Fixing token bug
Minor commenting code
Merge
Adding widescale_exam plugin