Peterbilt 389

changelog:
Peterbilt modified 1.12
changed dealer def file
added missing small lights and icons
added selectable rivets, chrome and painted option
added white versions of aircleaner, side lights, roof lights, small lights
added red blinker round lights
added red blinker rear bumper
added paint version of 389 style headlights
added new 3D model for 379 style, and 359 rectangular style headlights
added new chrome bug and side deflectors
added new grill variants
added new engines, sounds and transmissions (thanks to kriechbaum for his work)
deactivated headlights from parklight mode
fixed the cabin suspension
fixed the lift axle
fixed the dashboard info screen
changed the gps speed limit layout
worked on my new steering wheel (still WIP)
made some performance improvements on the interior
fixed some models
bug fixes