Properly limit *_MOTOR_DECAY_TIMESCALE to 120 as per specs.
Invode BSDynamics.Refresh() when vehicle type is changed. Previously
the vehicle properties weren't getting set because the physical
properties were set before the vehicle type was set.
Add a "use name" to BSMotors for identification while debugging.
Correct current and target confusion in BSVMotor design.
Rename CurrentValueReductionTimescale to FrictionTimescale.
Event more detailed logging.
Robert Adams