Class: RemoteWhiteboard
RemoteWhiteboard()
Receiving component of a Whiteboard.
When a client creates a screen sharing VRObject (by calling VRSPACE.createScriptedObject),
client-side presentation logic is implemented by this class.
Creates and shows the whiteboard, but only if not already created.
This allows for Whiteboard class to be used in two scenarios:
added to the world statically and shared on demand, or,
added and shared on demand.