Fixes a bug happening when removing at least 2 directories with the resource manger.
Merge branch 'improving-custom-action' into bugfix
"fixing" a bug happening when a user tried to remove a shortcut whose target was already removed.
Updating ForumBundle.
Merge pull request #252 from ngodfraind/bugfix

Fixing some bugs happening when resources are removed.
Merge pull request #253 from ngodfraind/master

Fixing a bug happening when a user was created and the demo fixtures were lot loaded.
Upgrade ForumBundle (Migrations fix)