A contact is now owned by a user for issue #146
Sends messages only to the contacts owned by the writeitinstance's owner issue #146
Now it sends a mail for bounced contacts
Now it sends an email only when is a contact is set to bounced the first time
Adding subject to notification mail and closes #146
Adding diagram and django-extensions for requirements.txt  and settings
Merge pull request #151 from ciudadanointeligente/contact_bounced_notification

Contact bounced notification