function DotPlugin() {
		throw("DotPlugin cannot be instantiated.");
	}
The RelativePlugin for TweenJS enables tweening nested properties using dot syntax. Install using:

	RotationPlugin.install();

To use the plugin, begin property names with `.`, such as:

	createjs.Tween.get(targ).to({".position.x":20})

You can access array indexes with the same dot syntax:

	// this would tween: foo.points[1].y
	createjs.Tween.get(foo).to({".points.1.y":30})

@class DotPlugin
@constructor