AnalyticalGraphicsInc/czml-writer — pull request #82 by mramato (2014-08-01 04:33:52+00:00)
Title: Directions consistency.

I'm not crazy about the way we handle directions right now, but I do think they should be consistent. This change makes both single directions and directionlists allow for the same set of ways to express them: spherical, unitSpherical, cartesian, unitCartesian.