Fix texures

* Add missing Mipmap generation call
* Add missing state clearing
* Add optional linear Mipmap flag setting
* Add optional edge clamping
* Fix texture orientation in Batcher.bf
* Fix example

SampleGame/src/Program.bf

@@ -8,6 +8,7 @@ namespace Strawberry.Sample
 		static public int Main(String[] args)
 		{
 			let sdl = scope SDL2PlatformLayer();
+			sdl.TexturesEnableEdgeClamping = true;
 			let game = scope SampleGame(sdl);
 
 			game.Run();