-- x, y, state (open|closed), needs (item_id), says (door_template, typically), ex:
--4,4,closed,item_iron_key,door_template
--21,2,closed,nil,nil
7,4,closed,nil,nil
13,4,closed,nil,nil
2,5,closed,nil,nil
6,5,closed,item_jade_key,door_template
7,6,closed,nil,nil
17,6,closed,nil,nil
1,8,closed,nil,nil
20,9,closed,nil,nil
4,11,closed,nil,nil
15,12,closed,nil,nil
21,12,closed,nil,nil
9,14,closed,nil,nil
1,16,closed,nil,nil
15,16,closed,nil,nil
17,18,closed,nil,nil
3,20,closed,nil,nil
--5,20,closed,item_lead_key,door_template
--10,21,closed,nil,nil
18,21,closed,nil,nil
11,18,closed,item_jade_key,door_template
21,2,closed,item_jade_key,door_template
