Stub out backend filter_* methods and document expected behavior.
Reference tests for backend filtering. All currently fail since neither backend actually define these methods.
Don't use operator functions as constants.
Implement filtering in Django backend. Fix typo in date filtering test case.
Add filtering support to Dummy backend. Clear storage in setup to prevent leaking global state in the test cases.
Modify runtests to allow running a single test.
Add filter support in the client API.
Adding filtering info to the usage docs.
Typo.
Use back-ported unittest2 from django.utils.
Merge pull request #9 from caktus/5-basic-filtering

Data Filtering. Fixes #5