FlightGear - Flight Simulator FGAddon

Make the throttle adjust the mixture, add Fuel-Tap and Blip support for JSBSim and assorted small fixes.

Initial Import

Removal of the now unused Aircraft/UIUC directory.

See http://thread.gmane.org/gmane.games.flightgear.devel/77094/focus=77496 and
the surrounding thread for discussions.

This removes the following: the old opus.mdl Microsoft Flight Simulator file,
probably for this aircraft https://en.wikipedia.org/wiki/ARV_Super2, which only
the Marchetti S.211 UIUC FDM aircraft pointed to but never used; the
sopwithCamel-v2-nl aircraft which was never developed past copying the
sopwithCamel-v1-n1 UIUC FDM data table files; and the README.uiuc.html file
which is redundant as equivalent text is found in all UIUC aircraft directories.

Lockheed1049h: Updated the preferences dialog

* Improved layout
* Removed fuel presets (now in refuelling dialog)
* Accessible via menu
* New option to disable light cones

Patch by Richard Senior.

Lockheed1049h: New refuelling dialog with realistic refuelling

* New refuelling dialog
* Realistic refuelling based on operating manual
* Presets for casual flying, fuel management, MLW, MTOW and manual
* MLW and MTOW presets calculated using payload

Patch by Richard Senior.

Lockheed1049h version 2.1:
* minor fixes to the latest autopilot patch by Richard.
* Downgrade the Systems rating to 3. We are now more ambitious and many more
systems can be implemented like electrical, pressurization, fuel boost, etc.
* Bump version number to reflect the new autopilot; this has user-visible
consequences in the cockpit.

Lockheed1049h: Tuned autopilot compatible with cockpit controls

* New autopilot
* Flight Path dial has all four positions (OFF, VHF, LOC, LOC+GS)
* Reworked autopilot helper with listener removal
* 3D cockpit synchronized to autopilot dialog
* Shortcut to toggle autopilot on/off (Ctrl-Z)
* Updated checklists

Another great patch by Richard Senior.

Fix for the Sopwith Camel YASim aircraft (sopwithCamel-YASim) for the FGAddon split.

See the thread at http://thread.gmane.org/gmane.games.flightgear.devel/77465 for
discussions.

After the split of the FGAddon repository from FGData, the sopwithCamel-YASim
aircraft would fail to start, instead showing a "FATAL" error. The problem was
the use of a relative path to ../Generic/ which no longer exists. Changing this
to Aircraft/Generic/ in the XML file fixes the path issue.

737-300: Added info about soundfiles to readme file.

Change the way the steering column works, the previously was modeled after an improper replica. Fis some small issues.