FlightGear - Flight Simulator FGAddon

Lockheed1049h version 3.0: rewrite multiplayer support entirely for a pilot and a flight engineer.

Instead of a pilot and a copilot who cannot control the aircraft, we
now have a pilot and a flight engineer who can control throttle,
mixture, superchargers, cowl flaps, magnoetos, engine start, fuel
valves including crossfeed and jettison.

The multiplayer protocol in this version is incompatible with previous
versions of the Connie, hence the major version number.

J3Cub: Remove unused states. Refactor GUI.

J3Cub: Tricycle configuration contact adjust, more.

J3Cub: Tricycle configuration contact adjust, livery.

J3Cub: Meta data update.

J3Cub: Trainer aircraft trigear configuration.

Metadata tags for B-1B

Lockheed1049h version 2.11.0: add a transponder to the overhead panel (ATC often
requires one over multiplayer).

B1900D: assorted bug fixes.
* Systems/fuel.xml (JSBSim only): fix that the main tanks would continue to feed
the collector tanks even when empty, leading to infinite range.
* Nasal/systems.nas: replace settimer loops with fixed-frequency maketimer loops.
* b190common.xml: add support for limits; add weight and speed limits.
Also factorize the loading of nasal modules.
* b1900d-set.xml, b1900d-ysm-set.xml: loading of nasal modules factorized above.

707: minor cleanup in fuel-and-payload.nas
* make the crossfeed flow per tank configurable through a property.
* prevent crossfeeding more fuel than a sending tank contains (defensive code,
I'm not entirely sure this is necessary).
* /b707/fuel/automatic-management: new; if true, switch all boost pumps to on
automatically whenever all sending tanks are empty.