Users can now report / unreport matches
 * Default setting for a new tournament is everyone can report / unreport
 * Admins can define what they want normal users to be able to do (report / unreport, only report, nothing at all)
 * All texts used by the function have gone through I18N
 * reporting is available using tournament's ID or the signupID but signupID is subject to access control

Updated I18N a bit too (english items in FR translations, typos ...)