First defined in: FKiSS4
		
		The 
glue action attaches 
target to 
parent, becoming a
		child object of 
parent. If 
target was already attached to an
		object, it is first detached from that object, triggering a
		
detached event if necessary.
 
		An object which is glued will move with its parent object. It can be
		detached only by the 
detach
		action.  A user moving the child object does 
not detach it from its
		parent when it is glued.
 
		target
		may be an object number or a variable representing an
		object number.
		parent
		may be an object number or a variable representing an
		object number.
    Example:
    ;@ glue(#5, #10)
    ;@ glue(VarTail, VarDonkey)