rename
Update CHANGES.md
Merge pull request #1523 from AnalyticalGraphicsInc/renameImageryCollection

centralBody.imageryLayerCollection -> centralBody.imageryLayers
Merge remote-tracking branch 'upstream/master'
Fix CZML vertexPositions and directions processing

There were regressions in the load code as part of #1444.  Basically vertexPositions and directions can be arrays or objects, we were not handling the array case.
Fix casing.
Merge pull request #1525 from AnalyticalGraphicsInc/czml-vertexPositions

Fix CZML vertexPositions and directions processing
Bump version to b26
Merge remote-tracking branch 'upstream/master'