Lfun:	can_put_and_get - enable an object to have an inventory

Synopsis:
	int can_put_and_get(string look_at)

Description:
	Define this function if you want to make it possible for a player
	to put items into it or get items from it. 

	If the look_at argument is given a player tries to look at the
	inventory of the object.

Return value:
	Return 1 if it is ok, to get or take items from the object, or
	if it is ok to look at its inventory. Otherwise return 0.

	This means that it is not possible to put/get something into/from
	an object per default.

	This is trivial for containers. If the are open, they return 1.

	If the id function accepts other things, like "lock" (in a chest for	
	example), then "lock" will be sent to can_put_and_get, which should
	return 0, because the lock has no inventory (of course).

See also: object/id, object/long, object/notify_item_enter, object/notify_item_leave, object/forbid_item_enter, object/forbid_item_leave, object/notify_enter_container, object/notify_leave_container, object/forbid_enter_container, object/forbid_leave_container, object/query_put_prep