AnalyticalGraphicsInc/cesium — pull request #1874 by shunter (2014-06-30 19:30:13+00:00)
Title: Flip CZML pixel offset origin for billboard and label.

Because CZML is not yet versioned, we can't distinguish new from old CZML. So, until we implement all our breaking changes in CZML 1.0, keep the existing convention in CZML.