Version 4.0.0

[examples] partial fix for BulletBouncingBox.py

[Numerics] cmake : 3.7.0 -> 3.7.1

[Numerics, Example] move dust under the carpet

3.6.1 on 3.6.x

3.6.0 version + git sha1 fix

first import of mechanisms in Mechanics

add osi as an Interaction property in InteractionsGraphs

  - remove _interactionOsiMap and associated functions
  - BouncingBallTS & 2D Disks
  - => tests missing (on ref pointer counts ...)

revisio used for Trasys