Add null check on multiple selection.
Add ToString overrides on some types.
Add dynamic geometry object selector wrapper methods. Fix divided surface selection. Fix point on face selection.
Merge branch 'ChocoButter-2Become1' of github.com:DynamoDS/Dynamo into ChocoButter-2Become1

Conflicts:
	src/Libraries/Revit/RevitNodes/Elements/FloorType.cs