Revert commits to Sandcastle example.
Revert commits to Sandcastle example.

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