Merge pull request #910 from ngodfraind/master

Rich text support fort text widget
Merge pull request #911 from ngodfraind/master

Fixing calendar short months short name.
Merge pull request #912 from ngodfraind/master

Notifications can be deactivated.
Merge pull request #913 from ngodfraind/master

Fixing google meta tag regex.
Merge pull request #914 from ngodfraind/master

Adding "administrate" right
Merge pull request #915 from ngodfraind/master

Administrate perm
Create README.md
Merge pull request #916 from ngodfraind/master

A new event is thrown on resource permissions change.
Merge pull request #919 from ngodfraind/master

Significantly improve the recursive edition permission speed.
Models in csv (wip)
User csv import can handle empty lines.
Merge pull request #920 from ngodfraind/bugfixes

User csv import can handle empty lines.
Merge branch 'master' of https://github.com/claroline/CoreBundle

Conflicts:
	Validator/Constraints/CsvUserValidator.php
Users import with csv can use models.