[org] notes on why there are two methods for updating contact points.
[org] notes on why there are two methods for updating contact points.

Some thoughts on why we ended up with two solutions, how they differ,
and why it's not so simple to move OCC to the same method as Bullet.

radarsat1/siconos,siconos/siconos,fperignon/siconos,bremond/siconos,bremond/siconos,siconos/siconos,bremond/siconos,radarsat1/siconos,fperignon/siconos,fperignon/siconos,siconos/siconos,siconos/siconos,bremond/siconos,bremond/siconos,radarsat1/siconos,fperignon/siconos,radarsat1/siconos,radarsat1/siconos,fperignon/siconos