Kinematic unit

See merge request !28

Conflicts:
	source/RobotAPI/components/units/RobotUnit/RobotUnit.cpp

use the optimised way to get valueChangedSignal of a DescribedWidget for functions in the RobotUnitGuiPlugin

move and rename the time measurement macro (RobotUnit.cpp -> util.h) ( ARMARX_[VIRTUAL_]TIMER -> ARMARX_[VIRTUAL_]STOPWATCH )

put the doc pages for the HomogeneousMatrixCalculator and RobotUnitPlugin widget into the GuiPlugins subpage

remove the checkRefCountIsOne function since the object deletion by the armarx manager is now delayed until RobotUnit::onExitComponent is done

change robot unit to use VirtualRobot::Robot::clone() instead of VirtualRobot::Robot::clone(std::string)

Rt robot unit v2

See merge request !26

change LVL1Controller::rtPreActivateController and LVL1Controller::rtPreActivateController::rtPostDeactivateController to be protected