Quitada vistas de mailing, petition and fax and added one in common to _sign_form
Solved bugs in message controller. Now it can send messages!
Added name of models and #types class method.
Added logic for validate sign to models Message and Petition
Forgotten in before commit, also added validate! to Fax
Huge refactor, now usign methaprogramming for message_sign, petition_sign and fax_send. Also now usign validate! in validate the sign
More DRY Mailman for sending messages of validation of adhesion
Merge remote-tracking branch 'origin/develop' into develop