player can now choose between different shields and weapons. added consumable items (healing potion)

src/de/miaurizius/jgame2d/entity/item/ShieldWoodObj.java

@@ -10,7 +10,7 @@ public class ShieldWoodObj extends Entity {
         super(panel);
         name = "Wooden Shield";
         description = "[" + name + "]\nAn old shield. It's not\nthat strong but its okay.";
-        type = EntityType.ITEM;
+        type = EntityType.SHIELD;
         down1 = initEntitySprites("objects/shield_wood");
         defenseValue = 1;
     }