Merge pull request #25 from yprez/fix_string_priority_representation

Allow passing priority as string, thanks to @yprez. Fixes #23
Fixed post_office logger set on the root
Merge pull request #30 from SeiryuZ/master

Fixed post_office logger set on the root
Fixes inconsistent HTML tag usage in docs
Merge pull request #33 from wadevries/master

Fixes inconsistent HTML tag usage in docs
Refactored mail.send to use mail.create().
Fixed deprecation warning in test.
Added mail.send_many().
Document mail.send_many().
Replaced assertEquals with assertEqual.
Make all tests pass on Python 3.
Tell Travis to test on Python 3.3 as well
Bump version to 0.6.0.
Indicate Python 3 compatibility in setup.py.
Travis shouldn't run Django 1.4.5 on Python 3.
Added attachment model + some tests

Ref #24