Fixed https://github.com/msgpack/msgpack-c/issues/148
Fixed inttypes.h inclusion problem on MSVC.
Fixed msgpack_object_print implementation using PRIi8, PRIi64, and PRIu64.
If 64bit print is not supported on fprintf, dispatch to fallback print.
Merge pull request #150 from redboltz/fix_fprintf_macro

Fixed https://github.com/msgpack/msgpack-c/issues/148