Ball grasping demo

[lucasw]

Inspired by roscon 2017 talk about reinforcement learning.

[lucasw]

Current state:

https://www.youtube.com/watch?v=Qmmv5mTUCuc

[lucasw]

Also looking at CreateEllipsoid in btSoftBodyHelpers- it is complicated enough to wrap it, don't want to duplicate it yet in python (though that would be nice).

It uses teh Hammersley method to put points on a sphere, the passes that through a convex hull library that may generate additional points or just groups the existing ones into triangles that are then made into links and faces for the bt soft body.