Created Articles Model

- Added unittests and separetd it into folders.
- Updated the settings.py file to plugin to the database.
Issues
- 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).
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- 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
Mistake merge roll back
Got rid of unnecessary tests for model creation
Changed Article model field names
Adding migration file for edited Article Model
Merge branch 'feature/create-article-model-test-south' of https://github.com/praekelt/go-nike-ghr into feature/create-article-model-test-south

Conflicts:
	articles/models.py
Deleting left over test_models.py from git pull
Default for publish_at is .now instead of .now()

Date time field is now updated for each new record
Deleted old and created new migrations
Merge branch 'develop' into feature/create-article-model-test-south

Conflicts:
	js_sandbox/lib/go-nike-ghr.js
	js_sandbox/test/test-go-nike-ghr.js