user can't delete his personal workspace
WS registration confirmation is now clikable and point to workspace open action. User doesn't have to back to his ws list anymore to visit it
Some dql optimization.
HomeTab optimization.
Javascript bug fixes + translation update
Bug fixes + Gui Update
Merge pull request #468 from arnaudbey/cant-delete-a-personal-workspace

user can't delete his personal workspace (or he sould have a way to create a new one)
Merge pull request #475 from arnaudbey/visit-workspace-after-subscribe

WS registration confirmation is now clikable and point to workspace open...
Merge pull request #477 from ngodfraind/doctrine-optimization

Doctrine optimization
Merge pull request #478 from solispauwels/master

Javascript bug fixes + translation update
Merge branch 'master' of github.com:claroline/CoreBundle into configurable-captcha
changing label