Fix the region setup bug.

Previously, the set() method would overwrite coordinates completely
without min/max'ing the values to preserve the invariant that p1 is
the lowest point and p2 the highest.

resources/plugin.yml

@@ -1,7 +1,7 @@
 name: MobArena
 author: garbagemule
 main: com.garbagemule.MobArena.MobArena
-version: 0.95.2
+version: 0.95.1.1
 softdepend: [Spout,Towny,Heroes,MagicSpells,Vault]
 commands:
     ma: