Django-post-office

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* **IMPORTANT**: ``mail.send`` now expects recipient email addresses as the first
argument. This change is to allow optional ``sender`` parameter which defaults
to ``settings.DEFAULT_FROM_EMAIL``
* Fixed a bug where all emails sent from ``mail.send`` have medium priority

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* **IMPORTANT**: added South migration. If you use South and had post-office
installed before 0.3.0, you may need to manually resolve migration conflicts
* Allow unicode messages to be displayed in ``/admin``
* Introduced a new ``mail.send`` function that provides a nicer API to send emails
* ``created`` fields now use ``auto_now_add``
* ``last_updated`` fields now use ``auto_now``

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* Fixed typo in ``admin.py``

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* Allows sending emails via database backed templates

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* Errors when opening connection in ``Email.dispatch`` method are now logged