Deleted RoleWriter and UserWriter
Merge branch 'refatoring-for-unit-test-nico' of https://github.com/claroline/Claroline into refactoring-for-unit-tests-kitan

Conflicts:
	src/core/Claroline/CoreBundle/Manager/RoleManager.php
	src/core/Claroline/CoreBundle/Writer/RoleWriter.php
Fixed bug with personal WS in user manager
Merge pull request #71 from claroline/refactoring-for-unit-tests-kitan

Refactoring for unit tests kitan