Updated to MonoGame 3.6 + Directory refactor

- Barotrauma's projects are in the Barotrauma directory
- All libraries are in the Libraries directory
- MonoGame is now managed by NuGet, rather than referenced from the installed files (TODO: consider using PCL for easier cross-platform development?)
- NuGet libraries are not included in the repo, as getting the latest versions automatically should be preferred
- Removed Content/effects.mgfx as it didn't seem to be used anywhere
- Removed some references to Subsurface directory
- Renamed Launcher2 to Launcher

Barotrauma/BarotraumaShared/Source/GameSession/CargoManager.cs

@@ -0,0 +1,50 @@
+using Microsoft.Xna.Framework;
+using System.Collections.Generic;
+
+namespace Barotrauma
+{
+    class CargoManager
+    {
+        private List<ItemPrefab> purchasedItems;
+        
+        public CargoManager()
+        {
+            purchasedItems = new List<ItemPrefab>();
+        }
+
+        public void AddItem(ItemPrefab item)
+        {
+            purchasedItems.Add(item);
+        }
+
+        public void CreateItems()
+        {
+            WayPoint wp = WayPoint.GetRandom(SpawnType.Cargo, null, Submarine.MainSub);
+
+            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.WorldPosition);
+
+            if (cargoRoom == null)
+            {
+                DebugConsole.ThrowError("A waypoint marked as Cargo must be placed inside a room!");
+                return;
+            }
+
+            foreach (ItemPrefab prefab in purchasedItems)
+            {
+                Vector2 position = new Vector2(
+                    Rand.Range(cargoRoom.Rect.X + 20, cargoRoom.Rect.Right - 20),
+                    cargoRoom.Rect.Y - cargoRoom.Rect.Height + prefab.Size.Y/2);
+
+                new Item(prefab, position, wp.Submarine);
+            }
+
+            purchasedItems.Clear();
+        }
+    }
+}