Added the ability to specify a custom rebirth npc id, which is automatically added to the list of scriptable npcs for overriding. Changed scriptable npcs to use config instead of a constants file, so that users can easily modify them without digging into the code and requiring a rebuild.

config.yaml

@@ -461,3 +461,7 @@ server:
     #Event End Timestamp
     EVENT_END_TIMESTAMP: 1428897600000
 
+    #Any NPC ids that should search for a js override script (useful if they already have wz entries since otherwise they're ignored).
+    NPCS_SCRIPTABLE:
+      #- 9200000 # Cody
+      - 9001105 # Grandpa moon bunny