Weird bouncing when restitution=1 set in Ammo example


New "materials" example using Ammo driver, with restitution set to 1 for both the floor and the ball.

Ball bounces vertically twice, then suddenly bounces off at an angle.

Not yet clear why?  A problem in the underlying physics simulation, or some other cause?  Not yet investigated whether this happens with other restitution values < 1.