Add quotes around the INSTALLED_APPS entry
Merge pull request #2 from sys13/patch-1

Add quotes around the INSTALLED_APPS entry
Better __unicode__ for EmailAddress objects (#5)
Deprecate some properties in favor of methods

I was on a I-really-love properties streak a year ago.
Add 'add_confirmed_email' method
Add add_email_if_not_exists method
Update test targets
Adjust return value of add_email_if_not_exist

If the email is already confirmed, return None rather than a
confirmation key which the client would have no use for.
update from upstream