Config

Update PickUpMyStuff/settings.py, PickUpMyStuff/wsgi.py, and manage.py to use django-configurations class based configuration for configuration seperation between development and production.

This also includes all backEnd commits made before 12AUG14.
I should have asked this before I submitted the pull request, but do we really want to call this app 'users'? It seems like that's rather unspecific (which may reduce modularity/future reusability) and be easily confused with the built in django User. At the very least some sort of identifier would be helpful, like PUMS_User