Updated CHANGES.md
Updated CHANGES.md

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