Style again.
Now using SerializationConfig 1.7
Shifted world properties to its own class WorldProperties so we can now only initialize an MVWorld if there is a 'more solid' world reference.  Let's hope this works!  Should fix #947
Fixes #960
Block safety debugging moved to finest level.
Multiverse now uses it's own portal search radius by default (16 blocks instead of bukkit's 128).  2 new configuration options added to adjust this behaviour.
Newly created END worlds will now use a scale of 16.  This will result in people ending up invariably closer to the end island when teleporting in while using MV-NetherPortals.
Now uses world UUID to retrieve world reference.
Now removes projectiles shot by the entities removed by the purger.   Should fix #958.
Improved world purger debug.
Fixed tests for entity purger changes.
"mv regen" now respects world type!
Now caches the world properties before unloading the world in order to prevent NPE on unload then load.  Really fixes #947.
MVWorld now throws IllegalStateException when it cannot obtain a world reference.  This should help pinpoint the source of sometimes cryptic exceptions elsewhere.
Fixed up some migration issues caused by WorldProperties refactor.  Fixes #968.
Fixed issue where Multiverse always checks block safety to fix world spawns on startup/reload.
Fixed world spawns not keeping pitch + yaw.  Fixes #976
New worlds now use the correct scale.  Fixes #979.
Now building against Bukkit 1.4.5-R0.2
Added world seed to the info command.

Fixes #627.