Clean up imports and add Django 1.7 app hook
Clean up the tox file & environment selection
Break up the new method on the metaclass
Fixes bad attribute reference
Use kwargs with `get_or_add_user`
Add a second fully custom orgs app to example

Oh what wonderous errors we have created.
Solves multi-module problem for metaclass

When base classes are used for models in multiple applications then it
is important to be able to separate those relationships.