Add notes to README on how to configure for SketchUp internal.
Add notes to README on how to configure for SketchUp internal.


thomthom/testup-2,thomthom/testup-2,thomthom/testup-2,SketchUp/testup-2,thomthom/testup-2,SketchUp/testup-2,SketchUp/testup-2,SketchUp/testup-2,SketchUp/testup-2,thomthom/testup-2,SketchUp/testup-2,thomthom/testup-2