API: return user rights while fetching a score

GET /score.json/{id}: Add rights property (type 'CollaboratorRights')
Editor: mode read only
Clean less directory
API: refactoring GET /user.{format}/{id}/scores
Auth UI: fixes CSS path
Remove useless tpls
Panel "Score contributed to"
Editor: history panel
Translation FR
Clean commit messages when commit using ws
Commit messages are now safe for display