Starling Feathers Controls ProgressBar

說明：

進度條。

示例：

var progress:ProgressBar = new ProgressBar();
			progress.minimum = 0;
			progress.maximum = 100;
			progress.value = 20;
			progress.x=100;
			progress.y=100;
			this.addChild( progress );           

效果：

更多說明參考：

http://wiki.starling-framework.org/feathers/progress-bar