msgpack-cpp relies on its users to include, directly or indirectly, the <type_traits> header before including msgpack headers. If they don't, it can't compile, because std::remove_volatile will not be declared. This fixes the issue by including it from msgpack, which should be fine now that msgpack-cpp requires C++11.
- 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
MSVC CLI defined their own nullptr and provides for __nullptr for standard C++11.
https://msdn.microsoft.com/en-us/library/4ex65770.aspx
msgpack-c introduce MSGPACK_NULLPTR for internal use, it is defined as __nullptr only if compiled on C++ CLI otherwise defined as nullptr.
jwbee