Fixes imports for lazy loading tests
Adds tests for .limit() and .offset()
Adds a *bunch* of combinatorial tests for limit, order, and sort
Skips many-to-many tests whose desired behavior is not yet well-defined.
Adds basic tests for Model.node__backref__field syntax.
Adds EphemeralStorage backend to tests
Adds logging to StoredObject's .find() and .find_all() methods.
Adds test for lazy loading on ForeignList backref fields.
Merge pull request #32 from lyndsysimon/feature/milestone_tests

Feature/milestone tests