added Bo1_Polyhedra_Aabb.aabbEnlargeFactor
added Ig2_Polyhedra_Polyhedra_PolyhedraGeom.interactionDetectionFactor
added Ig2_Polyhedra_Polyhedra_ScGeom class
added Ig2_Polyhedra_Polyhedra_PolyhedraGeomOrScGeom class to handle both ScGeom and PolyhedraGeom between polyhedral particles
added example/test scripts