Add tests with failing condition for OPTIONS request method
Add a get_object method to BulkUpdateModelMixin

Some Django REST Framework methods expect a get_object method when they see that PUT requests are allowed (e.g., GenericAPIView.metadata). For a bulk update view, the object being modified is the queryset itself, so we return that.
Style fixes
Add Mjumbe Poe to the list of contributors
Merge pull request #14 from mjumbewu/options-requests

Options requests