Fixed Welcome / Farewell Messages

Also re-introduced the negative coords fix,
as that bug has re-appeared again for some reason.

There were also some more NPE derps that were removed
and that caused some issues with some commands
Add player only to active Region ...

... instead of all regions at a given location.
Important is only the one that mandates the current rules.
Nothing else.
Fixed the negative coords bug thing

Also fixed XML source so it would save/load welcome/farewell messages.
They go into the meta element