- Enhance CMakeLists.txt files.
- Move to Boost Test from Google Test to support pre-C++11 compilers.
- Add more configurations on CI matrix builds.
- Other minor fixes
Replaced boost/ with msgpack/ and BOOST with MSGPACK in Boost.Preprocessor files.
Renamed existing macron in versioning.hpp to avoid confict with MSGPACK_PP_*.
Removed MSGPACK_USE_BOOST requirement from MSGPACK_DEFINE_MAP.