Adding MailTrap functionality to Mailer
I added the functionality for a debug mode in which emails are sent to the MailTrap server.  This is activated by setting the Mailer class field DEBUG to True.  The emails can then be seen on Mailtrap.io by logging in with the email "struct.by.lightning@gmail.com" and the password "team6password".
Normal email functionality can be restored by setting DEBUG to False.
Committed by: Alec Thompson