Replace broken Enter Location map with a 3x3x3 block region portal check

Signed-off-by: Irmo van den Berge <bergerkiller@gmail.com>
Merge branch 'master' of github.com:bergerkiller/MyWorlds

Conflicts:
	src/main/java/com/bergerkiller/bukkit/mw/MWListener.java
Remove old findPortalAtPosition method (now replaced)