Use mkspec try_flags to detect compiler support for -mssse3
Enable SSSE3 for Visual Studio
Use standard detection for GCC-compatible compilers + Remove dependency on cpuid/config.hpp
Remove cpp files violating the one-definition rule + Fill all warnings on MSVC
Only disable cpp files for MSVC
Merge remote-tracking branch 'remotes/origin/adding-ssse3-binary4' into peter-ssse-additions
Use platform library + Configure cxxflags on a per-file basis in wscript_build
merge with peters branch