mark files for change
Merge branch 'master' into getSetPropertiesPrimitives
Billboard, Credit, ImageryLayer, Label, Polygon, Polyline
update sandcastle
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