[MC] Build Migrations from "1.6 Survival" to the New 1.7+ Survival World"

[moodyoctopus]

Where my build is: http://176.9.157.196:8123/?worldname...3.315482859968
and where I would like it moved to: http://176.9.157.196:8123/?worldname...98&y=64&z=2158

Thank you so much <3

Also, We do have underground stuff-- a lot of it. But I reckon it only goes down to about Y=52. I hope that helps.

Done by Jack