Update Citadel.xml

defenders can't edit around the wool room (the entire cylinder that it's in, about a 22-23 radius circle around the middle of it)
no one can edit the wool room below y:50
players can't build inside the ocean (stops them from making it leak on the edges
chest on the docks can't be broken
no one can edit the attackers' spawn
no one can edit the defenders' spawn