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/BarotraumaServer/Source/Characters/Character.cs

@@ -0,0 +1,32 @@
+using FarseerPhysics;
+using FarseerPhysics.Dynamics;
+using FarseerPhysics.Dynamics.Joints;
+using Barotrauma.Networking;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Xml.Linq;
+using Microsoft.Xna.Framework;
+
+namespace Barotrauma
+{
+    partial class Character : Entity, IDamageable, IPropertyObject, IClientSerializable, IServerSerializable
+    {
+        //the Character that the player is currently controlling
+        private const Character controlled = null;
+
+        public static Character Controlled
+        {
+            get { return controlled; }
+            set
+            {
+                //do nothing
+            }
+        }
+
+        partial void InitProjSpecific(XDocument doc)
+        {
+            keys = null;
+        }
+    }
+}