Includes the new script to generate a Visual Studio "meta" solution.

BUG=angleproject:1569

Change-Id: I6760b2fb26f588117cd310afc7f92e9b4571a89c
Reviewed-on: https://chromium-review.googlesource.com/734709Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>