State, Sensors, System, Navigation, Control
able to use NAN to indicate when values aren't valid from INS.
The UAVObject definition (.xml) files are used by both the GCS build as well as the flight software builds. git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@2526 ebee16cc-31ac-478f-84a7-5cbb03baadba