Mouse input works

examples/hello/main.go

@@ -47,6 +47,12 @@ func run (application *stone.Application) {
 			application.Dot.X = 0
 			application.Dot.Y = 2
 			fmt.Fprintln(application, textBuffer)
+
+		}
+
+		if application.Pressed(stone.MouseButtonLeft) {
+			x, y := application.MousePosition()
+			application.SetRune(x, y, '#')
 		}
 		
 		if !application.Await(frameDelay) { break }