This fails with:
``` 
FieldError: Cannot resolve keyword u'score' into field. Choices are: authors, contact, contact_id, id, isbn, name, pages, price, pubdate, publisher, publisher_id, rating, store
``` 
which is kind of expected because so far the changes proposed by this PR don't include the work of related to aggregation/annotations by contributor nate_b on his patches for https://code.djangoproject.com/ticket/16735