Gavril GPV Expansion 1.1

This update brings the following new parts:

• A dog-leg gearbox, using new shift logic. If you use an H-shifter to play, it now follows the real life layout of reverse at top left and 1st at bottom left. This allows you to switch between going backwards and forwards much faster while manoeuvring off road, and change more smoothly between 2nd and 3rd while cruising. No need to rebind any controls, and no impact on users who don't use an H-shifter.
• Animated manual gear shifter. Works for both dog-leg and regular gearboxes and follows the correct shift pattern for the current gearbox.
• Interactive high/low range and transfer case levers, which animate when combined with a new transfer case to support this functionality.
• Civilian and military bodies with interactive buttons to activate headlights, ignition, horn and handbrake. (Note that these bodies are currently very similar to each other and I plan to add more distinguishing details to them later, but I needed the custom bodies adding now so I could install a new slot for the shifters)