Merge pull request #180 from MikePopoloski/master

Adding WinRT Support
Updated README.
Added 23-vectordisplay example.
Merge branch 'master' of github.com:bkaradzic/bgfx
Updated README.
Added 23-vectordisplay shaders and screenshot.
Cleanup.
Cleanup.
Cleanup.
Cleanup.
Updated NanoVG and Blendish.
Fixed GCC/Clang warnings.