Update Microsoft compiler and Dinkumware library support up for the 2013 RC release. Remove support for the November 2012 CTP. Anyone using that release or the June 2013 Preview release for Boost development should upgrade to the 2013 RC release. See http://msdn.microsoft.com/en-us/library/vstudio/hh409293%28v=vs.120%29.aspx for details.
Variadic templates are supposed to be supported by VC++ 2013 but VC++ 2013 RC variadic support is causing boost regression test failures for signals2 and several of its dependencies, so continue to define BOOST_NO_CXX11_VARIADIC_TEMPLATES. Also, use _MSC_FULL_VER < 180020827 as more conservative to distinguish the RC release from earlier releases.
Config: Remove obsolete MSVC version check
Remove obsolete MSVC check from pragma guard

 git grep -h -B1 "^#\s*pragma once" | grep -v pragma | sort | uniq

is now clean.