Added a 'userProperties' ad hoc object to Renderable. -  A typical use case is to associate application defined data with a picked renderable. - The default value is an empty object.
Added a 'userProperties' ad hoc object to Renderable.
-  A typical use case is to associate application defined data with a picked renderable.
- The default value is an empty object.

NASAWorldWindResearch/AgroSphere,NASAWorldWindResearch/AgroSphere