Make OCClassMockObject (and OCPartialMockObject) return the mocked class from its -class method.  Added a -proxyClass method, for when the proxy's actual class is needed.
Change name of method from -proxyClass to -mockObjectClass per pull request comments
Merge pull request #63 from carllindberg/FixClassProxyClassReporting4

Make OCClassMockObject (and OCPartialMockObject) return the mocked class...