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Role list management: name can be changed and roles can be removed.
Adding security for RolesController.
Merge pull request #680 from ngodfraind/updating-role-admin-tool

Updating role admin tool
Small ResourceVoter fix for imporsonation.
Merge pull request #681 from ngodfraind/fixing-rights-when-impersonnating

Small ResourceVoter fix for imporsonation.
Refactoring the role management interface (error handling still missing).
Patching notification for workspace subscription.
Merge pull request #685 from ngodfraind/refactoring-roles-tool

Refactoring the role management interface (error handling still missing)...
Merge pull request #686 from ngodfraind/notifications-bugfix

Patching notification for workspace subscription.
Fixing user selection in message form.
Adding success messages.
Error handling for role list.
Merge pull request #689 from ngodfraind/fixing-messagery

Fixing user selection in message form.
Adding initialisation date to the user entity.
typos
Merge pull request #691 from ngodfraind/refactoring-roles-tool

Refactoring roles tool
Redirect to the login form after user creation.
Allow to download file with special chars in name.
Merge pull request #702 from ngodfraind/bugfix

Redirect to the login form after user creation.