ETS2 - Zil 4421 Truck (1.36.x)

Zil 4421 is 5423's older brother. This is the real Zil 4421, no fake outdated files, no 750HP engine, no fancy tuning hassle, just Zil 4421.

- ETS2 1.36 DX11 update
- Motor rewrite closer to reality
- Air cables added
- Added to Zil custom dealership
- Log file almost clean

Authors: Fox071rus, Nikon Oleinichenko, Anton Aronson, Stas556, Ultrabald