Created Articles Model

Fixes #1  

@gitumarkk - see: https://github.com/blog/1506-closing-issues-via-pull-requests - if you can't use the hub add-on you need to ref the issue this feature addresses as above.

- Added unittests and separated it into folders.
- Updated the settings.py file to plugin to the database.
- Did south migrations to the database (migration file 0006 might be
wonky as I had to edit by hand, worked for forward don't know about
backwards).

Issues
------------
- The tests are very slow possibly due to raven not being configured and
celery being loaded to the database, tried to implement following link
but wasn't helpful
http://stackoverflow.com/questions/4055860/unit-testing-with-django-celery