Update Windows PHP-SDK binary tools

Hi! I my opinion, it would be good to offer an up-to-date php-sdk-binary-tools-2015MMDD.zip on <http://windows.php.net/downloads/php-sdk/>. Currently the latest version is nearly four years old and contains rather old versions of the binaries, accordingly. Especially, phpsdk_setvars.bat is completely outdated, and creates trees for VC 6 and VC 8, but not for VC 11 or even VC 14. The how-to "Build your own PHP on Windows"[1] mentions the issue, so that it's not a real problem, but it would be nice to make building on Windows as easy as possible[2]. I'm gladly willing to help with this, but I don't know if there's a public repo, or some documents describing where to get the binaries resp. how to build them, etc. [1] <https://wiki.php.net/internals/windows/stepbystepbuild> [2] <http://chat.stackoverflow.com/transcript/message/23563126#23563126> -- Christoph M. Becker