Renaming Windows to WindowsGL

I'm starting to implement the new Windows Desktop platform using DirectX 11.

We currently have the following Windows projects:

 - MonoGame.Framework.Windows
 - MonoGame.Framework.Windows8
 - MonoGame.Framework.WindowsPhone

The first step seemed to be renaming the existing Windows project to WindowsGL so that the new project can be named Windows.  This seemed like a more logical name than WindowsDX.

I'm open to better ideas, but this seems like the best one so far if we want to maintain the OpenGL Windows code.

Not sure if this affects anything else in the codebase.... installer script or templates maybe?  Please let me know and i'll fix those as well.