SwiftMailer sends on submission and approval, has option to

request further amendments from the author.

 - Moved get_submit_programme_for_editing to Programmes
   controller from Revisions controller as it is programme
   specific.

 - Added email notification (to EMS) in get_submit_programme_for_editing

 - Added email notification (to author) in post_approve_revision

 - Added optional ability to send message to revision author
   (to request further changes) via post_request_changes

 - Added !important override for CKEditor width for send message
   modal dialogue input box.

 - Added config file for notifications (config/programme_revisions.php.sample)