FlightGear - Flight Simulator FGAddon

an24: animate the front gear doors properly, using standard properties.

The standard properties are not only transmitted over multiplayer but also recorder for replays.
This change therefore restores compatibility of the front gear with replays. Also saves 18 bytes
per mp packet by avoiding 3 unnecessary float properties.

* an24b-set.xml (sim/multiplay/generic/float[1..3],
an2/animations/gear, an2/animations/gear-smalldoors, an2/animations/gear-bigdoors): delete.
* Models/An-24B.xml (nasal/load): delete the aliasing of the deleted properties.
Animate the front gear and its doors using only gear/gear[0]/position-norm.
* Models/Interior/Instruments/Control_Units/Gear/sw_gear-lever.xml: ditto.
* Models/Interior/Instruments/Control_Units/Gear/gear-lever-lock.xml: ditto.
* Tutorials/Engineer-Preflight.xml: ditto.

an24b: do not pollute the property trees of remote aircraft over multiplayer.

(Redo r3560 that was partly overwritten and undone by r3561)

find Models -name '*.xml' -exec sed -r -i 's,prop(erty)?>/,prop\1>,g' {} \;

an24b: animate nose, nose gear, ailerons and rudder over multiplayer.

Starting with r3558, the nose and nose gear would no longer be visible
over multiplayer because they use nonstandard properties. As a
interim solution, I am now aliasing these to generic properties and
transmitting them over multiplayer. A better long-term solution for
the nose gear would be only to use the standard property
gear/gear[0]/position-norm but make the animation more complex (i.e.
in animate doors between 0 and 0.2, animate the gear between 0.2 and
0.8 and animate the small doors again between 0.8 and 1.0, or
something like that). This would save 3 floats in each MP packet,
i.e. 18 bytes.

For the ailerons and rudder, use standard properties directly.

an24b: First tutorial and minor changes in crewsection.ac and fire extinguishing system

an24b: do not pollute the property trees of remote aircraft over multiplayer.

find Models -name '*.xml' -exec sed -r -i 's,prop(erty)?>/,prop\1>,g' {} \;

an24b: redo r3557 with prior approval from maerchenprinz.

an24b: Correcting cockpit dimensions and therefore new cockpit canopy/hull; new front and pax section of fuselage

an24b: animate flaps over multiplayer and in replays

For the animation of the external model, use the standard property
surface-positions/flap-pos-norm instead of the property from the FDM
as only the former is automatically transmitted over multiplayer and
recorded for replays.

an24b: Initial models of optional Kurs-MP set

F4U: realism: the aircraft had a two-stage, two-speed supercharger that really behaved
as a three-speed supercharger. The first stage was always engaged. The second stage
could be disengaged ("neutral"), in "low" speed or in "high" speed.

* Checklists/climb.xml: adjust; add reference.
* f4u-set.xml: add a rating. Adjust keybindings:
Alt+Q: shift supercharger speed down.
Alt+S: shift supercharger speed up.
* f4u-yasim.xml: use "neutral" supercharger for approach.