void SetupInputHandler() {
GameObject handlerParent = GameObject.Find ("InputHandler");
if (!handlerParent) {
handlerParent = new GameObject();
handlerParent.name = "InputHandler";
handlerParent.AddComponent("InputHandler");
handlerParent.transform.parent = transform.parent;
}
handler = handlerParent.GetComponent<InputHandler>();
handler.RegisterListener (this);
}