Add class monitor to place #121
Improve notification mailer for monitors and others. Closes #121
Add papertrail for tracking changes #49
Add class monitor index #121
Update messages and who receive email when a reservation is updated #49
Updates reservation history for single reservation. #49
Add history to reservation group #49
Add highlight to changes. #49
Add complete history to reservation group #49
Last touches on reservation history. Closes #49