FlightGear - Flight Simulator FGAddon

PC-12: delete the angle-of-attack indicators from the cockpit.

The real aircraft doesn't have them and they didn't work properly anyway.

PC-12: delete unused instrument files, continuing r3164.

PC-12: improve realism of the cockpit.

* Models/Interior/Panel/Instruments/{KT76A,chrono}: delete.
* Models/Interior/Panel/Instruments/ki206: copy from the DR400-dauphin. Modify to use nav2
instead of nav1. (Note: this is because the stock KI206 in $FG_DATA/Aircraft/Instruments-3d
is not satisfactory).
* Models/Interior/Panel/panel.xml: use the stock M877 clock and place it like on [1].
Swap the positions of COM1/NAV1 (now on top) and COM2/NAV2 (now on the bottom) in the radio stack.
Use the stock KT76A from $FG_DATA/Aircraft/Instruments-3d.
Add a KI206 instrument for NAV2, where the (oversized) clock was previously, like on [1].
* pc12-base.xml: load the nasal module for the M877 clock.

[1] http://cbaviation.com/wp-content/uploads/2017/06/Cockpit-3.jpg

Alouette-III: Resize and soften ALS interior shadow cube

PC-12: replace the vertical and horizontal situation indicators with electronic
ones from the Beechcraft 1900D, this is more realistic; see
http://cbaviation.com/wp-content/uploads/2017/06/Cockpit-3.jpg

* Models/Interior/Panel/Instruments/{EADI,EHSI,RMI,kfc200}/: delete.
* Models/Interior/Panel/panel.xml: use the EFIS-84 instruments instead.

PC-12: copy the EFIS-84 instruments from the b1900d.

Alouette-III: ALS interior shadows

PC-12: bug fixes: remove all references to aircraft other than the PC-12.

PC-12: six new high-resolution liveries by Andreas Spiekermann; thanks!

PC-12: new interior from Andreas Spiekermann, with lightmap and massively updated cockpit. Thanks!