Fixes bug where the WindowsPhone template will not work in Visual Studio 2013.
Merge pull request #2237 from Jark/develop

Fixes bug where the WindowsPhone template will not work in Visual Studio 2013
Wow, these were wrong for a LONG time.
Merge branch 'develop' of git://github.com/mono/MonoGame into monogame-sdl2
Wii U GamePad buildfix
Clean up/rewrite Graphics/States/ folder.
Forgot a license header...
Remove a couple unused files