1. Added router funtionality to compliment newly added ViewSets in views.py. 2. Changed API docs URL to separate from browserable web API index. 3. Added auth and token URLs. 4. PEP8 tidy up
1. Added router funtionality to compliment newly added ViewSets in views.py. 2. Changed API docs URL to separate from browserable web API index. 3. Added auth and token URLs. 4. PEP8 tidy up

gcushen/mezzanine-api,gcushen/mezzanine-api