Add should_send_own_updates field to Profile model. This field

determines whether or not the user should receive email updates about

their own activity, such as submitting review requests, reviewing

requests, or replying to review requests. The default value for this

field is True.
Add an evolution, profile_should_send_own_updates, to add the same

field to the Profile model. This evolution sets the value for the

field to the default: True.
Add should_send_own_updates field to the Profile settings dialog.

This field is tied to the should_send_own_updates field on the

Profile model.
Add should_send_own_updates method to the User model. This method is

patched on like the other methods in accounts/models.py.
The send_review_email removes the user sending the email from the

set of recipients  if they have their should_send_own_updates field

set to False unless they are one of the people assigned to the

people field of the review request.

Ran evolution successfully.
Unit tests pass.
Tested with local development server. With should_send_own_updates

set to False, when a review request is created, that user only

receives an email if they are assigned as a reviewer (in the people 

field, not the groups field).