Renaming Windows solution and project to WindowsGL.
First pass at a new Windows DirectX platform.
Merge branch 'develop3d' into windesktop
Added initial WinForm platform and window stubs.
Fixed bug that was preventing the framebuffer from being created in the correct size on iOS.
Fixes orientation issues for devices that support multiple orientations, as well as a single (such as landscape only).
Using a view's ContentScaleFactor rather than Window.Screen.Scale since there can be a race condition of a null window.
Preventing KeyboardInputViewControllers from returning an orientation that the application does not support. (Which will throw an exception).
Interim work on audio import and processing.
Merge branch 'develop3d' of https://github.com/mono/MonoGame into pipeline
Added content building classes.
Added solution for windows content pipeline.
Added project for the MonoGame Content Builder command line tool.
First pass at parsing the .contentproj and executing the build.
Added SoundEffect.FromStream
WIP for pipeline.
* Added XML documentation to several classes.
Merge branch 'develop3d' of https://github.com/mono/MonoGame into pipeline
Implemented an internal ctor that accepts a Stream and set FromStream to use that for Desktops.

I have FromStream throw NotImplementedEX for Android and everything else processes like normal.
We better handle exceptions in content processing.
PipelineManager expects absolute assembly paths now.
We now use the XNAGSv4 environment variable to resolve XNA assemblies.
We now try to load assemblies from the GAC if possible.
The output folder name is now specified on the command line.
Merge branch 'develop3d' of https://github.com/mono/MonoGame into pipeline