Remove calls to deprecated redirect_to shortcut.
registration: use django 1.5 compatible views.
Fix view name quoting in {% url %} template tags.

(Required for Django 1.5 compatibility.)
Use a class-based list view for KegList.

(Required for Django 1.5 compatibility.)
Delete obsolete claim_token endpoint.
Fix for "DoesNotExist" error in Django 1.5.

Apparently due to Django bug #13839, can no longer nullify a
OneToOneField via its referant.
Bump required django-socialregistration version to 0.5.10

(Required for Django 1.5 compatibility.)

Also bumps minimum Django version to 1.4.
docs: fix typo in upgrade docs.