Emails: Contributor Updates

[rajadain]

Overview

When there are updates in the system, the users are notified via email.

A Contributor should be sent an email when:

• They submit a boundary, with a link to the submission
• When their boundary has been reviewed and needs revisions:
  
• When their boundary has been approved

Only do plain text emails for now, that should have all the information and wording as in the screenshot above.