Merge remote-tracking branch 'origin/master' into Ubuntu18.04

MotionPlanning/tests/SabaCSpaceTest.cpp

VirtualRobot/CMakeLists.txt

VirtualRobot/CollisionDetection/CDManager.cpp

VirtualRobot/CollisionDetection/CollisionModel.cpp

VirtualRobot/CollisionDetection/CollisionModel.h

...alRobot/CollisionDetection/CollisionModelImplementation.h

VirtualRobot/CollisionDetection/PQP/CollisionCheckerPQP.cpp

VirtualRobot/CollisionDetection/PQP/CollisionModelPQP.cpp

VirtualRobot/CollisionDetection/PQP/CollisionModelPQP.h

VirtualRobot/IK/DifferentialIK.cpp

...ualRobot/IK/constraints/JointLimitAvoidanceConstraint.cpp

VirtualRobot/IK/constraints/JointLimitAvoidanceConstraint.h

VirtualRobot/SceneObjectSet.cpp

config.cmake