Home Controller Update
Merge branch 'master' of https://github.com/solispauwels/CoreBundle
Home page translations editor update
Merge remote-tracking branch 'upstream/master'
theme update
GUI update - small fixes
Setting default group variable to an empty array

Correct the error raised on https://github.com/claroline/CoreBundle/blob/master/Event/Log/LogRoleSubscribeEvent.php#L121 when group is empty and returned null.
twig variable strict update
Merge remote-tracking branch 'upstream/master'
Merge pull request #350 from solispauwels/master

Home page  update (editor with translations)