User can't see all Workspaces in which he is registered
User can't unregister from Workspaces which are configured to have self unregistration
Merge pull request #846 from solispauwels/master

allow "-" in user name
Fixing updater.
Adding missing namespace.
Authentication source can be set in csv.
Fixing drag&drop file creation.
Fixing opening file wrong name.
Fixing table.js global selection.
Fixing archive unzipping upload.
Merge pull request #847 from ngodfraind/bugfixes

Bugfixes
Adds search on workspaces list and registration list
Merge pull request #848 from kitan1982/master

Adds search on workspaces list and registration list
Fixing unzipping error on special chars.
Fixing command line csv import logs.
Merge pull request #849 from ngodfraind/bugfixes

Bugfixes
Fixes competence bug when registering user to workspace
Fixing the desktop agenda widget.
Merge pull request #850 from kitan1982/competences-bugfix

Fixes competence bug when registering user to workspace
Merge branch 'master' of https://github.com/claroline/CoreBundle into bugfixes