Merge remote-tracking branch 'refs/remotes/MonoGame/develop3d' into develop3d

Conflicts:
	MonoGame.Framework.Content.Pipeline/MonoGame.Framework.Content.Pipeline.Windows.csproj
	MonoGame.Framework/Graphics/Shader/ConstantBuffer.cs
	MonoGame.Framework/MonoGame.Framework.WindowsPhone.csproj
	MonoGame.Framework/iOS/GamerServices/Guide.cs
	MonoGame.Framework/iOS/iOSGameView.cs
	ThirdParty/Libs