Added a README file regarding WinRT support

To note, this file is currently formatted with CRLF line endings, rather than
LF, to allow the file to be viewed with Notepad.

premake/projects/SDL2main.lua

@@ -0,0 +1,31 @@
+-- Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+--
+-- This software is provided 'as-is', without any express or implied
+-- warranty.  In no event will the authors be held liable for any damages
+-- arising from the use of this software.
+--
+-- Permission is granted to anyone to use this software for any purpose,
+-- including commercial applications, and to alter it and redistribute it
+-- freely.
+--
+-- Meta-build system using premake created and maintained by
+-- Benjamin Henning <b.henning@digipen.edu>
+
+--[[
+SDL2main.lua
+
+	This file defines the SDL2main project which builds the SDL2main static
+	library for Windows and Mac. This project is primarily for everything but
+	Linux.
+]]
+
+SDL_project "SDL2main"
+	SDL_kind "StaticLib"
+	SDL_language "C"
+	SDL_sourcedir "../src"
+	SDL_dependency "windows"
+		SDL_os "windows|mingw"
+		SDL_paths { "/main/windows/" }
+	SDL_dependency "macosx or ios"
+		SDL_os "macosx|ios|cygwin"
+		SDL_paths { "/main/dummy/" }