Support Facebook Connect

[aidanlister]

Facebook Connect allows users to register, authorise, and facilitates use of the Facebook Javascript SDK.

We need to build:
a) A middleware which will read the cookie set by the javascript SDK and provide request.facebook.graph access.
b) Registration workflows

The middleware might look something like this:
https://github.com/aidanlister/django-facebook/blob/master/django_facebook/middleware.py

This middleware checks each vector, and if it finds a successful login it initiates the graph consistently.