Make animation speed independent of real framerate

I have done some modifications on this example to maintain the targeted animation speed even if the device has low performance. In this case, some frames of animated object can be skipped.

Modifications:
Use the stage.tick function to disptach the tick event to all animated
objects.
Turn off stage.tickOnUpdate.
Use QueueNewFrame to let the browser manage the frame rate according to
the device performance.