AnalyticalGraphicsInc/cesium — pull request #1334 by mramato (2013-12-09 19:38:21+00:00)
Title: Handle CZML availability with multiple intervals.

`DynamicObject.availability` is now a `TimeIntervalCollection` instead of a `TimeInterval`. The availability property is still always replaced when a new availability is provided, no merging happens.

@shunter I know we seem to run into new issues whenever we start playing with `availability`. I think we're okay here, but let me know if you think of any reason this isn't a good idea, or if it creates any issues I didn't think of.

CC @mrmattf