To remove boost dependency, `-DMSGPACK_USE_BOOST=OFF` for cmake.
By default, `-DMSGPACK_USE_BOOST` is `ON`.
NOTE: In order to build tests `-DMSGPACK_USE_BOOST=ON` is required.
For C++ compiler, the option `-DMSGPACK_NO_BOOST` is required to remove
boost.
When you add or remove .h .hpp .c files in the msgpack-c library, run
make_file_list.sh. It generates (overwrites) Files.cmake for cmake and
src/files.mk for autotools. They are a part of repository managed
files. Files.cmake is included by CMakeLists.txt and src/files.mk is
included by src/Makefile.am.
