fix broken packages arg - array, not string
new test suite for django version
rearranging fixtures
Ditch mockito, use mock. Some tests passing.

I could not figure out how to use mockito to mock out the Subscription
class, so I switched to the proper mock module (stdlib in py33). Turns
out it is plenty easy to use, is well documented, and does what I want.

At this point managing subscriptions is tested, but nothing that cares
about actual feeds is implemented yet.