AnalyticalGraphicsInc/cesium — pull request #1495 by mramato (2014-02-21 14:06:38+00:00)
Title: Tweak CZML reference frame handling

Not specifying a reference frame usually defaults to FIXED, however if you specified the INERTIAL frame in a previous packet, we should not overwrite that with FIXED if it is left out of subsequent packets for the same interval.

CC @kring @mrmattf