Kenworth T800/W900 Pack

This is a Kenworth T800/W900 pack.  It also includes C500 hoods.

It is based on AJ Deere's Kenworth Vocational pack, which I have cleaned up quite a bit.

There are a lot of configurations, things I specifically added:

- adjustable frame lengths from 181" to 493" in 6" increments.  493" is to support AJ's oil field beds

- adjustable rear frame overhang

- Added Twin Steer Options

- Added Twin Steer Spacing

- Added multiple AR configurations to support a bunch of different modders AR style beds

- Added selectable lift axles, none up to three (used crab steer options to choose which lift axles steer.  So if you just have one down you can select it so that it steers while the other lift axles do not.

There were a ton of other things done but cannot remember them all.