FlightGear - Flight Simulator FGAddon

Citation II: remove alpha-channel from textures

Citation II:

* refine magcompass
* darken cockpit glass reflections

More aircraft meta-data fixes for hangar support.

Citation II:

* improved engine's fan animation and new UV-mapping
* improved front gear model (leave gear damper from compression)
* added landing lights to rotate animation of main gear and select
by gear-norm + electrical power

CRJ700-Family: Renumbered EICAS pages and add EICAS control panel dialog.

From: Henning Stahlke <github@...>

CRJ700-Family: Add developer dialog accessible via config option.

From: Henning Stahlke <github@...>

CRJ700-Family: Init AP internal variables and moved roll-mode prop to autopilot/internal/
Move half-bank-disable logic from nasal to ap-rules.

From: Henning Stahlke <github@...>

MiG-15: bumb version number to 3.1.1.

MiG-15bis: merge all of the remaining changes from Andreas Zenner.

* new thumbnail.
* new sounds.
* minor updates to the liveries and 3D model.

MiG-15: make the heat tube always visible again as suggested by Andreas Zenner.