ENH: Pass the address of the new MRML node to event handlers, when the NewDeviceEvent event is invoked. For Slicer Bug Report 0003478 and request in https://github.com/SlicerIGT/OpenIGTLinkRemote/issues/16
Merge pull request #17 from tokjun/3478-IGTLConnectorNode-NewDeviceEvent-improvement

ENH: Pass the address of the new MRML node to event handlerson NewDeviceEvent.