FlightGear - Flight Simulator FGAddon

747-400: add more aerodynamic data

777: hide OH panel and pedestal when in exterior view, hide exterior model when in interior view, correct external/internal views by Sidi762; add low poly pedestal by Lars0817; revision 19 of https://sourceforge.net/p/flightgear-777/777/HEAD/tree/777/

777: Start of cabin development by Lars0817; Updates to reflection effect and liveries, add paintkit by Sidi762; Add Dev folder by Isaak. (revision 16 of https://sourceforge.net/p/flightgear-777/777/HEAD/tree/777/)

Harrier-GR3: Harrier-GR3-set.xml: minor change to docs.

Harrier-GR3: Harrier-GR3-keyboard.xml: Alt-shift-M toggles nozzles vertical.

Harrier-GR3: added states files to -set.xml.

Harrier-GR3: added approach and vto states.

Harrier-GR3: Nasal/generic-yasim-engine.nas: modified to allow autostart state.

Harrier-GR3: Hud/HUD.xml: show 'F' if autohover nozzles vertical is active.

Harrier-GR3: lots of improvements to autohover.

Autohover:

Improved lots of docs.

Cope with verbose display window sometimes not entirely being closed - it
seems we need to call .close() via a timer.

Created property gear/wow_any which is true if any gear is touching groune;
simplifies things because other parts of autohover can now use a listener
to detect landing, instead of polling.

Moved z-offset into global variable - no need for this to be a property.

Use property node objects to avoid looking up nodes via paths.

Changed autohover code to use a more consistent pattern where we have a
single listener which is called whenever state could be changed - e.g. by
wow or replay - and a timer to run the polling. The former can then decide
whether to call timer.stop() and close any relevent window.

Added nozzle-vertical, where we make nozles always point vertically,
regardless of aircraft pitch; makes it easy to do a Farley Climb. [Need to
figure out how to allow this to work with forwards-speed control.]

Fixed various issues with reloading autohover. We now initialise autohover
only if/when sim/signals/fdm-initialized is true to avoid problems where
we start too soon (e.g. with states). But this needs to be done at the
*end* of autohover.nas, otherwise if we are reloading autohover.nas, we
can initialise using some functions/data from the previous invocaction of
autohover.nas.

Other:

Changed controls/auto-hover/y-height to
/controls/auto-hover/y-height-target to be consistent with other
properties.

HUD now shows rotation info for both 'speed' and 'speed pid' modes.