function Ticker() {
		throw "Ticker cannot be instantiated.";
	}
The Ticker provides a centralized tick or heartbeat broadcast at a set interval. Listeners can subscribe to the tick
event to be notified when a set time interval has elapsed.

Note that the interval that the tick event is called is a target interval, and may be broadcast at a slower interval
when under high CPU load. The Ticker class uses a static interface (ex. `Ticker.framerate = 30;`) and
can not be instantiated.

<h4>Example</h4>

     createjs.Ticker.addEventListener("tick", handleTick);
     function handleTick(event) {
         // Actions carried out each tick (aka frame)
         if (!event.paused) {
             // Actions carried out when the Ticker is not paused.
         }
     }

@class Ticker
@uses EventDispatcher
@static