Merge branch 'master' into Ubuntu18.04

CMakeLists.txt

CMakeModules/BulletCheckPrecision.cmake

CMakeModules/BulletCheckPrecision.cpp

CMakeModules/FindBullet.cmake

CMakeModules/FindCoin3D.cmake

GraspPlanning/GraspQuality/GraspEvaluationPoseUncertainty.h

GraspPlanning/examples/GraspPlanner/GraspPlannerWindow.cpp

MotionPlanning/CSpace/CSpace.cpp

MotionPlanning/CSpace/CSpaceSampled.cpp

MotionPlanning/examples/IKRRT/CMakeLists.txt

MotionPlanning/examples/RRT/CMakeLists.txt

MotionPlanning/examples/RrtGui/CMakeLists.txt

SimDynamics/CMakeLists.txt

VirtualRobot/CMakeLists.txt

VirtualRobot/CollisionDetection/CDManager.cpp

VirtualRobot/CollisionDetection/CollisionChecker.cpp

VirtualRobot/CollisionDetection/CollisionChecker.h

...Robot/CollisionDetection/CollisionCheckerImplementation.h

VirtualRobot/CollisionDetection/CollisionModel.cpp

VirtualRobot/CollisionDetection/CollisionModel.h