Remove all references to WandHelper from GuiSpellDisplay and abstract them behind ISpellCastingItem

src/main/java/electroblob/wizardry/item/ItemWand.java

@@ -107,6 +107,16 @@ public class ItemWand extends Item implements IWorkbenchItem, ISpellCastingItem,
 		return WandHelper.getCurrentSpell(stack);
 	}
 
+	@Override
+	public Spell getNextSpell(ItemStack stack){
+		return WandHelper.getNextSpell(stack);
+	}
+
+	@Override
+	public Spell getPreviousSpell(ItemStack stack){
+		return WandHelper.getPreviousSpell(stack);
+	}
+
 	@Override
 	public Spell[] getSpells(ItemStack stack){
 		return WandHelper.getSpells(stack);
@@ -127,6 +137,16 @@ public class ItemWand extends Item implements IWorkbenchItem, ISpellCastingItem,
 		return WandHelper.selectSpell(stack, index);
 	}
 
+	@Override
+	public int getCurrentCooldown(ItemStack stack){
+		return WandHelper.getCurrentCooldown(stack);
+	}
+
+	@Override
+	public int getCurrentMaxCooldown(ItemStack stack){
+		return WandHelper.getCurrentMaxCooldown(stack);
+	}
+
 	@Override
 	public boolean showSpellHUD(EntityPlayer player, ItemStack stack){
 		return true;