FlightGear - Flight Simulator FGAddon

F6F-Hellcat: new FDM, two-speed supercharger and some bug fixes.

* Do not pollute the property trees of remote aircraft over multiplayer:
find Models/ -name '*.xml' -exec sed -r -i 's,>/,>,g' {} \;
* Models/Interior/Panel/Instruments/rpm/rpm.xml: one revolution of the needle per 1000 rpm
instead of per 10k RPM. Makes the instrument much more usable.
* Systems/f6f-keyboard.xml, Systems/help.xml: Alt+S to toggle supercharger speed.
* f6f-base.xml: initialize property for supercharger speed. Allow-toggle-cockpit: true.
* f6f-yasim.xml: rewrite performance numbers to allow landing. Previously, the propeller
thrust at idle was such that even with full flaps, airspeed would not drop below 90 knots,
preventing landing.
Also, implement the two-speed, two stage supercharger of the R-2800. Low speed can
maintain 56" of manifold pressure (!) up to 14500 ft; high speed up to 23500 ft. Not
implemented is the power drawn by the supercharger.

B-25: animate the supercharger control levers. More assorted bug fixes.

* Models/Interior/Panel/Pedestal/console.xml: animate the supercharger control levers; add
a pick animation that calls...
* Nasal/b25.nas: ... the new procedure Engine.toggle_blower().
* Models/Interior/Panel/Instruments/vsi/vsi.xml: correct the movement of the needle.
* b25{,j}-yasim.xml: the nose wheel is castering, not steerable. Use tail wheel lock for the
nose wheel lock for consistency with taildraggers. USE DIFFERENTIAL BRAKING ONLY TO STEER.

B-25: do not pollute the property trees of other aircraft over multiplayer.

find Models/ -name '*.xml' -exec sed -r -i 's,>/,>,g' {} \;

Also, delete Systems/engines.xml and the loading thereof in b25-base.xml; unnecessary.

B-25: assorted bug fixes.

* Systems/views.xml: remove spaces around the numbers for the fields of view.
* b25-base.xml: do not load blower.nas anymore; redundant with the blower parts in b25.nas.
* Nasal/blower.nas: delete.
* Nasal/b25.nas: make F and f keys shift blower speeds on both engines, not just the right engine.
* Models/Lights/light-cone.xml: remove from the preview of fgrun.
* Models/Interior/Panel/Pedestal/console.xml: rotate the landing light switches correctly
(ON=forward).
* Models/Interior/Divers/divers.xml: remove leading slashes in property paths.

B-24-Liberator: rotate the dorsal turret with the mouse.

Contribution by Alexandre Brenta, taking and adjusting turrets.nas by 5H1N0B1
from the B-17.

* Models/Guns/guns.xml: rotate vertically with a parameter.
* Models/b24.xml:
- rotate the dorsal turret horizontally. Note: some interior elements do not
rotate yet; they are part of the fuselage and should be separated from it.
This is a planned enhancement.
- rotate the guns vertically, passing various parameters as overlays to each
gun. This makes it very easy to add more animations for the other views in the
future by changing only turrets.nas.

Planned enhancements:
* Split from the fuselage the elements that should be part of turrets; in particular
in the tail turret and the interior of the dorsal turret.
* Write the missing animations for the tail turret, waist and nose guns.

dhc2: implement wing tip tanks; the aircraft had 100 pounds of fuel in
each by default but the switch in the cockpit was non-functional.

* Systems/fuel.xml: new fuel flows from the wing tip tanks to the forward tank.
* Nasal/dhc2.nas: delete unused code.

cabin altitude and fuel consumption update

Minor changes (cold start eg) and GPK big error (thanks to OO-BRE to call attention to that)

J3Cub: do not pollute the property trees of remote aircraft over multiplayer.

find Models/ -name '*.xml' -exec sed -r -i 's,>/,>,g' {} \;

J3Cub: fix the animations of the beacon and strobe over multiplayer
(Nasal runtime error). Continuation of r3314.