Added IDialogImage, a scripted object which is used by IDialog. Used to add dialog images.

IDialog:
-Added several new functions for dialogs' new visual attributes, as well as a way to add, get, create, remove, and clear dialog images.

Global NPC events:
-Added fields and variables from the old ScriptEvent events, in preparation to replace the old events with NpcEvent instances on local NPC scripts.
-Fixed issue where some event hooks would run on remote worlds.

Global NPC killed event:
-Added droppedItems and expDropped fields.

IWorld and NpcAPI:
-Now always uses a non-remove WorldServer object to create ScriptWorld objects and add them to the world cache.

src/main/java/noppes/npcs/scripted/NpcAPI.java

@@ -207,13 +207,13 @@ public class NpcAPI extends AbstractNpcAPI {
         return getIItemStack(new ItemStack(item, size, damage));
     }
 
-    public IWorld getIWorld(WorldServer world) {
-        ScriptWorld w = (ScriptWorld)worldCache.get(world.provider.dimensionId);
+    public IWorld getIWorld(World world) {
+        ScriptWorld w = worldCache.get(world.provider.dimensionId);
         if (w != null) {
-            w.world = world;
+            w.world.provider.dimensionId = world.provider.dimensionId;
             return w;
         } else {
-            worldCache.put(world.provider.dimensionId, w = ScriptWorld.createNew(world));
+            worldCache.put(world.provider.dimensionId, w = ScriptWorld.createNew(world.provider.dimensionId));
             return w;
         }
     }