Compatibility layer for generators, test function fixtures

Issue #4 resolved
Jason Pellerin
repo owner created an issue

nose2 needs a compatibility layer to support loading generator tests implicitly, adapting nose style generator test yields to unittest2 style, and adapting nose style setup/teardown for test functions for unittest2 style. This should take the form of turning off unittest2's moduleloading plugin and supplying a plugin of our own with subclasses of moduleloading's plugins.