AnalyticalGraphicsInc/cesium — pull request #558 by shunter (2013-03-08 23:12:05+00:00)
Title: Fix date comparisons to use equals

Several places in DynamicScene used reference equality for caching values by date instead of `equals`. On my system, fixing this reduces the CPU usage while paused by about 1%.

Also cleaned up JulianDate a bit.