-- Re-added GetMsvcVersion() to the msvc toolchain since it's needed for generation Visual Studio projects.
-- Added support for building project files for Visual Studio 2015.
-- Cleaned up the Visual Studio project generator so the version info is a bit more tightly coupled to what's specified in the msvc toolchain.
-- Fixed the arguments for the regenerate solution project so the args are more accurately preserved and quotes are only added around parts that have spaces in them.