CraftBukkit uses vanillas DimensionManager, but does not actually
register its own dimension types, etc, due to vanilla
This causes issues because anything, e.g. command feedback, trying
to print information about the world will often attempt to print out
the dimension name, which ends up throwing an NPE due to the lack of
a registered type, we work around this by just returning the world name,
this is not super elegant, but is the only route that promises not to
break stuff.
