Bus should move

[kfarr]

• User tester expects bus (and cars, other vehicles) to move as well as trains

Next steps:

• modify bus model to separate wheel from body frame
• re-attach wheels as children entities to the bus
• rotate wheels in correlation with velocity of vehicle and size of rims: https://courses.lumenlearning.com/physics/chapter/6-1-rotation-angle-and-angular-velocity/
• if this works, create separate tickets for other vehicles