VS build from scratch

I used the following two variables :
	@SETX MSSDK "C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A"
	@SETX VCSDK "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC"

SDK for Windows 8.1 and Studio Community 2013 were required to be installed on the build system.

This script is compatible with x86 and x64 architectures only.