added declare statement, moved animate label function, and added black animated outline to label
added declare statement, moved animate label function, and added black animated outline to label

AnalyticalGraphicsInc/cesium,CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,likangning93/cesium,YonatanKra/cesium,YonatanKra/cesium,likangning93/cesium,progsung/cesium,CesiumGS/cesium,likangning93/cesium,YonatanKra/cesium,AnalyticalGraphicsInc/cesium,progsung/cesium,YonatanKra/cesium,CesiumGS/cesium,likangning93/cesium,likangning93/cesium