latest version is attached to reduce need to search property
tree each frame. I don't think this will break any Fg code and
opengc has been updated a while back and have had no complaints ;-) so it
should be a no impact change, hopefully.
FDM people. FlightGear now supports an unlimited number of fuel
tanks. Also added correct fuel-flow reporting for piston engines, and
tracked new features in SimGear property support.