AnalyticalGraphicsInc/cesium — pull request #1507 by bagnell (2014-02-25 22:57:25+00:00)
Title: Minor doc fix

I noticed that the `CullingVolume` doc was missing from the reference doc when answering this [question]
(https://groups.google.com/forum/#!topic/cesium-dev/lXomic5tSKo).