Add support for authenticated requests

[chrisfranklin]

This uses cookies to store a token for token_authentication as described in the django-restframework documentation. This can be used with angular-django-registration-auth and django-rest-auth which makes it easy to integrate Angular and Django.

This works for me although I don't need to handle unauthenticated requests, if you need to handle both it would be worth testing and making sure it works.

[JustinTArthur]

Cool, I like the idea of supporting DRF's token auth. I'll test to make sure it will work for everyone else.