Implemented copy function for all RObjects

freecadobjects/RBox.py

freecadobjects/RCompound.py

freecadobjects/RCone.py

freecadobjects/RCut.py

freecadobjects/RCylinder.py

freecadobjects/RFuse.py

freecadobjects/RObject.py

freecadobjects/RPipe.py

freecadobjects/RPlane.py

freecadobjects/RSphere.py

freecadobjects/RTorus.py

freecadobjects/RWedge.py