Added paremeter user to MockHttpRequest. Added tests for http module.
Changed user parameter to be a user instance
Merge pull request #12 from alej0varas/patch-1

Added paremeter user to MockHttpRequest. Added tests for http module.
Let the return value from the iterator method be a reference to the mock queryset. This way chained calls on querysets such as mock.all().filter().order_by() will work.