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

improve the HomogeneousMatrixCalculatorWidget (now it also shows the inverse and allows to multiply a vector with the matrix)

Conflicts:
	source/RobotAPI/gui-plugins/RobotUnitPlugin/RobotUnitPluginWidgetController.cpp

change RobotUnitPlugin to select the first lib containg the word controller of the currently selected package

apply astyle formatting

changed RobotUnit::getLVL1ControllerClassDescriptions to fail if the robot unit is not initialized after some time

# By Raphael
# Via Raphael
* 'RTRobotUnitV2' of https://gitlab.com/ArmarX/RobotAPI:
  change some status flags of LVL1Controller to be atomic change RobotUnit to deactivate publishing for every controller on exit (if publishing was active before) change the LVL1Controller publishing hooks to be protected
  change RobotUnit::publish to also skip RobotUnitState::Exiting and check for skipping again after the lock was acquired
  change RobotUnit to delete LVL1Controllers potentially beeing forgotten in the queue of controllers to be deleted
  changes the icon of the button to deactivate a controler to a pause button (RobotUnitPlugin)
  add the possibility to delete LVL1Controllers (deletion may be impossible for some controllers. e.g.: controllers used by the kinematic unit) extend the gui to be able to delete controllers extended the RobotUnitListener to carry this information (lvl1ControllerDeleted) extended LVL1ControllerDescription to carry this information add LVL1ControllerInterface isDeletable and deleteController

Conflicts:
	source/RobotAPI/gui-plugins/RobotUnitPlugin/RobotUnitPluginWidgetController.cpp