Work on fixing entity ID mapping

core/src/io/anuke/mindustry/content/TypeIDs.java

@@ -0,0 +1,18 @@
+package io.anuke.mindustry.content;
+
+import io.anuke.mindustry.entities.effect.Fire;
+import io.anuke.mindustry.entities.effect.Puddle;
+import io.anuke.mindustry.entities.type.Player;
+import io.anuke.mindustry.game.ContentList;
+import io.anuke.mindustry.game.TypeID;
+
+public class TypeIDs implements ContentList{
+    public static TypeID fire, puddle, player;
+
+    @Override
+    public void load(){
+        fire = new TypeID("fire", Fire::new);
+        puddle = new TypeID("puddle", Puddle::new);
+        player = new TypeID("player", Player::new);
+    }
+}