* Convert MASTER_SITES to http site from https site.
Changelog:
0.6 (2013-01-28)
----------------
* Added ``required`` attribute to ``Meta`` to be able to specify which
settings are required to be set.
* Moved to Travis for the tests: http://travis-ci.org/jezdez/django-appconf
* Stopped support for Django 1.2.X.
* Introduced support for Python >= 3.2.