Added tests for Vector3DTilePolygons
Added tests for Vector3DTilePolygons

hodbauer/cesium,progsung/cesium,AnalyticalGraphicsInc/cesium,geoscan/cesium,likangning93/cesium,likangning93/cesium,YonatanKra/cesium,kaktus40/cesium,hodbauer/cesium,jasonbeverage/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,progsung/cesium,kaktus40/cesium,likangning93/cesium,likangning93/cesium,jasonbeverage/cesium,likangning93/cesium,CesiumGS/cesium,josh-bernstein/cesium,geoscan/cesium,CesiumGS/cesium,josh-bernstein/cesium,YonatanKra/cesium,YonatanKra/cesium,YonatanKra/cesium,CesiumGS/cesium,CesiumGS/cesium,hodbauer/cesium