WIP: NinePatch image support.
WIP: Using NinePatch with custom renderers.
Added sln.ide to gitignore.
WIP: NinePatch content area.
Fixed content draw area.
WIP: Renderer visual cache.
Fixed button rendering to texture.
Created Shared project for Xamarin.Forms.Platforms.Xna.
Support for 9patch with IImageSourceHandler.