ebiten: Rename Draw*WithShader -> Draw*Shader

Updates #1168

examples/polygons/main.go

@@ -139,6 +139,8 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Polygons (Ebiten Demo)")
+	ebiten.SetScreenTransparent(true)
+	ebiten.SetWindowDecorated(false)
 	if err := ebiten.RunGame(&Game{ngon: 10}); err != nil {
 		log.Fatal(err)
 	}