applied patch to fix problem mocking groovy subclasses.
Specifically, it wasn't recognizing methods defined on the superclass.
Thanks to Shawn Garner and Tim Andersen for this fix.
I changed some of the test code to match our conventions (such as they are -- it's all pretty informal right now), so you can blame me for any problems in it!
added a note about the sublcass fix; maybe it's time for a 1.3 release...