Do not overlap frustums when rendering translucent geometry.
Update CHANGES.md.
Merge branch 'master' into multifrustum

Conflicts:
	CHANGES.md
Fix the rim lighting in GridMaterial to accept backface normals.
Merge pull request #1504 from AnalyticalGraphicsInc/grid-material-backface

Fix the rim lighting in GridMaterial to accept backface normals.
Merge branch 'master' into multifrustum
Minor doc fix.
Merge pull request #1507 from AnalyticalGraphicsInc/minorDocFix

Minor doc fix
Merge pull request #1459 from AnalyticalGraphicsInc/multifrustum

Fix translucent multifrustum artifact
Reorder CHANGES.md
Updated CHANGES.md
Fix CZML CompositeMaterialProperty processing

Rather than compositing multiple material intervals properly, we were overwriting the last interval with a new constant material property.

The new unit tests shows the problem clearly and fails without the fix to CzmlDataSource.
Merge pull request #1508 from AnalyticalGraphicsInc/czml-materials

Fix CZML CompositeMaterialProperty processing
Fix EllipsoidGeometryUpdater crash for ellipsoid with a 0 radii component.

EllipsoidGeometryUpdater has a fast path that scales a unit sphere rather than recreate geometry every frame.  It was crashing due to a bad model matrix if the radii ever went to zero.  This change simply clamps values to 0.001, which visually has the same affect.
Merge pull request #1509 from AnalyticalGraphicsInc/ellipsoid-geometry

Fix EllipsoidGeometryUpdater crash for ellipsoid with a 0 radii component
Merge branch 'master' into kml