Improved map rendering, shops, light bugfix, junction boxes wont break as easily

Subsurface/GameSession/CargoManager.cs

@@ -0,0 +1,53 @@
+using Microsoft.Xna.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Subsurface
+{
+    class CargoManager
+    {
+        private List<MapEntityPrefab> purchasedItems;
+        
+        public CargoManager()
+        {
+            purchasedItems = new List<MapEntityPrefab>();
+        }
+
+        public void AddItem(MapEntityPrefab item)
+        {
+            purchasedItems.Add(item);
+        }
+
+        public void CreateItems()
+        {
+            WayPoint wp = WayPoint.GetRandom(SpawnType.Cargo);
+
+            if (wp==null)
+            {
+                DebugConsole.ThrowError("The submarine must have a waypoint marked as Cargo for bought items to be placed correctly!");
+                return;
+            }
+
+            Hull cargoRoom = Hull.FindHull(wp.Position);
+
+            if (wp == null)
+            {
+                DebugConsole.ThrowError("A waypoint marked as Cargo must be placed inside a room!");
+                return;
+            }
+
+            foreach (MapEntityPrefab prefab in purchasedItems)
+            {
+                Vector2 position = new Vector2(
+                    Rand.Range(cargoRoom.Rect.X + 20, cargoRoom.Rect.Right - 20),
+                    Rand.Range(cargoRoom.Rect.Y - cargoRoom.Rect.Height + 20.0f, cargoRoom.Rect.Y));
+
+                new Item(prefab as ItemPrefab, wp.Position);
+            }
+
+            purchasedItems.Clear();
+        }
+    }
+}