AnalyticalGraphicsInc/cesium — pull request #1178 by evax (2013-09-24 13:58:50+00:00)
Title: Fix CZML object deletion

@mramato the issue date back to [the ES5 refactoring](https://github.com/AnalyticalGraphicsInc/cesium/commit/9ea51f6e1fdc319d1e29a70e841088bc48af7a42#L8L102)