Removed unused 'mox' module
Merge branch 'develop' of github.com:michalbachowski/pygrapes into develop
Updated vendors/pypromise submodule
Adde 'mock_helper' module with matchers
Use 'mock_helper' in core_test
Refactored grape_test to use 'mock' mocking library
Removed unused code from core_test
Removed dependency on 'mox' library; Unlock Python 3.2 and 2.6 environment testing