Removing exit
Fixing php notices
Fixing PHP notices
Disabling invitations notifications (just for now)
Fixing _user session variable in order to load once the _user array
Fixing phpqrcode autoload. The lib was always loaded no matter what. This need to be fixed in the phpqrcode lib repo. For now we use composer to generate the class map for this library.
Merge branch 'master' of github.com:chamilo/chamilo-lms