Alpha ETK 800/k series electric aftermarket 2.1

I have added a new Drive Mode system that allows the car's power to be controlled by the drive mode.

A few small texture improvements.

I have fixed the flex problems with the jbeam model. The next update should fix all textures unless I find other problems.

The JBEAM is stiffer now and should be more stable. the No Texture problems are still there, and I am working on a fix for it.