GitLab

Finishes SafeMatcherCast by catching lossy arithmetic conversions at compile-time; uses ACTION_TEMPLATE to simplify the definition of many actions; makes mock object uncopyable; teaches gmock doctor about wrong MOCK_METHODn.

- updates the doc string.
- adds a version number.
- fixes the condition for error messages in _GenerateMocks().

0 ClassNames means emit all classes found in the file.

The modifiers (things like const, volatile, etc) were not being added
to return types.