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'm not convinced that subclassing AbstractBaseUser is what we really want or need. I think the builtin [User](https://docs.djangoproject.com/en/1.6/topics/auth/) will be sufficient for our authentication needs. The docs on customizing the authentication model recommend that [custom User models only include information related to authentication](https://docs.djangoproject.com/en/1.6/topics/auth/customizing/#specifying-a-custom-user-model). If we want to store non-authentication related data, we should be use a [profile model](https://docs.djangoproject.com/en/1.6/topics/auth/customizing/#extending-user) that establishes a one-to-one relationship to a User.