cleanup, update CHANGES.md
Billboard doc fixes
BillboardCollection doc fixes
ImageryLayer doc improvements
Label doc fixes.
LabelCollection doc fixes.
Polyline doc fixes.
PolylineCollection doc fixes
More BillboardCollection doc fixes
More LabelCollection fixes
Merge pull request #1562 from AnalyticalGraphicsInc/getSetPropertiesPrimitives

Replace get/set functions with properties
Merge branch 'master' into issue1487
Merge pull request #1563 from AnalyticalGraphicsInc/dynamicEllipsoidShow

Fix Dynamic Ellipsoid Show
Fix #1548
Merge remote-tracking branch 'origin/master' into oit
Add link
Update license
Changes from review.
Rename FXAAResources -> FXAA.
More updates after review.