add functions for #1586
Merge branch 'master' into cartesian3
update sandcastle
update CHANGES.md
fix documentation
Added deprecationWarning
Update doc
3D -> heights
Use spyOn
Mark deprecationWarning as private.
Merge pull request #1681 from AnalyticalGraphicsInc/deprecationWarning

Added deprecationWarning
Merge branch 'master' into conciseCartesian3

Conflicts:
	CHANGES.md
Merge pull request #1671 from AnalyticalGraphicsInc/conciseCartesian3

Cartesian3 fromDegrees
Added deprecationWarning
Update doc
Use spyOn
Mark deprecationWarning as private.
Mark more classes private
Replace direct context.draw calls with DrawCommand.execute
Remove some Context doc