Parametric modeling Cut

Added parametric functionality at Cut so that if the reference shape that cuts through objects is modified the final Cut shape is regenerated. Currently Cut stores the list of objects affected by the Cut; will modify the current functionality (Cut is applied on all visible objects from the scene) to the functionality that if Cut is modified only the referenced objects will be modified and objects added later even if located on the Cut direction will not be altered by Cut regeneration, task estimated to take 1-2 hours. Will also investigate why the Cut Boolean operation gives result when it shouldn't.