Restoring the drag & drop.
Merge pull request #827 from ngodfraind/restore-dragdrop

Restoring the drag & drop.
Installer update
Merge pull request #830 from solispauwels/master

Installer update
Fixing links breadcrumbs for anonymous.
Merge pull request #831 from ngodfraind/links-breadcrumb

Fixing links breadcrumbs for anonymous.
Merge branch 'master' of https://github.com/claroline/CoreBundle into competences

Conflicts:
	Library/Installation/AdditionalInstaller.php