Fixed so the location for the random location not throw error when is set in a custom world, will fix the linked containers location also.
Improve, so you can set title message to "" and also added chat message for when a random container spawn. you can have both or set one of the messages to "" to turn it off, alternatively can you turn it of in the gui.
Fixed some inconsistency when you use world or player location as spawn point, if you turn if off it will not attempt to spawn new random containers.