Fixed Phake_Matchers_Factory::createMatcher() behavior when passing a class name. class_implements() !== is_subclass_of().
Removed Phake_Matchers_Factory::createMatcher() ability to accept class names. It wasn't necessary after all.
Merge pull request #79 from RickWong/master

Bug fix: Phake_Matchers_Factory::createMatcher('Class_Name') bad behavior