deps: Upgrade Django to 1.6
Django 1.6: Enable XFrameOptionsMiddleware
Django 1.6: Replace commit_on_success with atomic
Remove auth_ prefix from URL names to use standard names
Django 1.6: Remove test_cookie_worked() which lacks matching set_test_cookie()
Django 1.6: Change Manager.{get_query_set => get_queryset}()
Django 1.6: Make old migrations timezone aware
Django 1.6: Use default test runner
aggregator: Fix test
Fix error caused by Tastypie upgrade
api: Fix errors caused by Tastypie upgrade