added guardian as optional requirement, stubbed out object-level permission class
some properly failing tests, set up for standard permissions
necessary test settings for guardian
first pass at object level permissions and tests
switch to a dedicated filter for read list object permissions
removed unnecessary guardian req and view.action parsing
better doc for object permissions, drop redundant has_permission call
Merge branch 'master' of git://github.com/bwreilly/django-rest-framework into bwreilly-master
Tweaks and docs to object-level model permissions.