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/Characters/AI/SteeringPath.cs

@@ -0,0 +1,104 @@
+using System.Collections.Generic;
+using Microsoft.Xna.Framework;
+
+namespace Barotrauma
+{
+    class SteeringPath
+    {
+        private List<WayPoint> nodes;
+
+        int currentIndex;
+
+        public bool Unreachable
+        {
+            get;
+            set;
+        }
+
+        public SteeringPath(bool unreachable = false)
+        {
+            nodes = new List<WayPoint>();
+            Unreachable = unreachable;
+        }
+
+        public void AddNode(WayPoint node)
+        {
+            if (node == null) return;
+            nodes.Add(node);
+
+            if (node.CurrentHull == null) HasOutdoorsNodes = true;
+        }
+        
+        public bool HasOutdoorsNodes
+        {
+            get;
+            private set;
+        }
+
+        public int CurrentIndex
+        {
+            get { return currentIndex; }
+        }
+
+        public float Cost
+        {
+            get;
+            set;
+        }
+
+        public WayPoint PrevNode
+        {
+            get 
+            {
+                if (currentIndex-1 < 0 || currentIndex-1 > nodes.Count - 1) return null;
+                return nodes[currentIndex-1]; 
+            }
+        }
+
+        public WayPoint CurrentNode
+        {
+            get 
+            {
+                if (currentIndex < 0 || currentIndex > nodes.Count - 1) return null;
+                return nodes[currentIndex]; 
+            }
+        }
+
+        public List<WayPoint> Nodes
+        {
+            get { return nodes; }
+        }
+
+        public WayPoint NextNode
+        {
+            get
+            {
+                if (currentIndex+1 < 0 || currentIndex+1 > nodes.Count - 1) return null;
+                return nodes[currentIndex+1];
+            }
+        }
+
+        public bool Finished
+        {
+            get { return currentIndex >= nodes.Count; }
+        }
+
+        public void SkipToNextNode()
+        {
+            currentIndex++;
+        }
+
+        public WayPoint CheckProgress(Vector2 simPosition, float minSimDistance = 0.1f)
+        {
+            if (nodes.Count == 0 || currentIndex>nodes.Count-1) return null;
+            if (Vector2.Distance(simPosition, nodes[currentIndex].SimPosition) < minSimDistance) currentIndex++;
+
+            return CurrentNode;
+        }
+
+        public void ClearPath()
+        {
+            nodes.Clear();
+        }
+    }
+}