Variant#349

Merged

nobu-k merged 7 commits intomsgpack:masterfrom

redboltz:variant

Sep 4, 2015

Commits on Aug 18, 2015

Added msgpack::type::variant and msgpack::type::variant_ref that is based on boost::variant.
redboltz
committed
Fixed std::map::erase is ambiguous problem in osx, clang, libc++ combination.
redboltz
committed