skip loading the robot by the KinematicUnit if it already was set (this may be...

skip loading the robot by the KinematicUnit if it already was set (this may be done by a derived class prior to calling addObject for the KinematicUnit on the armarx manager)
change source/RobotAPI/drivers/OrientedTactileSensor/OrientedTactileSensorUnit.cpp to use std::abs instead of the c function abs