[boost] QVM library

I've updated the QVM library (which hasn't been reviewed yet), including minor changes plus a workaround for what appears to be a parsing bug in msvc-12: http://www.revergestudios.com/boost-qvm/ -- Emil Dotchevski Reverge Studios, Inc. http://www.revergestudios.com/reblog/index.php?n=ReCode P.S. Perhaps STL can confirm, I'm guessing that the MSVC bug was introduced by the added rvalue reference support, which interfered with the heuristics MSVC uses to attempt to successfully parse non-conformant code that doesn't use mandatory "typename". This can be seen for example in q.hpp, which used to contain functions like: template typename enable_if_c< is_q<A>::value && is_q<B>::value, A &>::type operator-=( A & a, B const & b ) which I had to change to: template typename enable_if< msvc_parse_bug_workaround::quats, A &>::type operator-=( A & a, B const & b ) where namespace msvc_parse_bug_workaround { template struct quats { static bool const value=is_q<A>::value && is_q<B>::value; }; }