Moved controllers into the robotunit doc group

...tUnit/NJointControllers/NJointCartesianTorqueController.h

...nit/NJointControllers/NJointCartesianVelocityController.h

...ntControllers/NJointCartesianVelocityControllerWithRamp.h

...ents/units/RobotUnit/NJointControllers/NJointController.h

...llers/NJointHolonomicPlatformRelativePositionController.h

...JointHolonomicPlatformUnitVelocityPassThroughController.h

...intControllers/NJointKinematicUnitPassThroughController.h

...s/units/RobotUnit/NJointControllers/NJointTCPController.h

...it/NJointControllers/NJointTaskSpaceImpedanceController.h

.../RobotUnit/NJointControllers/NJointTrajectoryController.h

...RobotAPI/libraries/DMPController/TaskSpaceDMPController.h

...Controllers/DMPController/NJointBimanualCCDMPController.h

...PINJointControllers/DMPController/NJointCCDMPController.h

...PINJointControllers/DMPController/NJointJSDMPController.h

...Controllers/DMPController/NJointJointSpaceDMPController.h

...PINJointControllers/DMPController/NJointTSDMPController.h

...ers/DMPController/NJointTaskSpaceImpedanceDMPController.h