Revamp VC10 projects based on patch from Matias Ghioldi

https://sourceforge.net/p/glew/patches/37/
Revert "Use git instead of clone to download OpenGL registry."

This reverts commit 974679c6d884fda238cdceb5c8211fc269cde1a3.
Revamp dist-src and dist-win32 Makefile targets.