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/BarotraumaClient/Source/GUI/GUIMessage.cs

@@ -0,0 +1,51 @@
+using Microsoft.Xna.Framework;
+
+namespace Barotrauma
+{
+    class GUIMessage
+    {
+        private ColoredText coloredText;
+        private Vector2 pos;
+
+        private float lifeTime;
+
+        private Vector2 size;
+
+        public string Text
+        {
+            get { return coloredText.Text; }
+        }
+
+        public Color Color
+        {
+            get { return coloredText.Color; }
+        }
+
+        public Vector2 Pos
+        {
+            get { return pos; }
+            set { pos = value; }
+        }
+
+        public Vector2 Size
+        {
+            get { return size; }
+        }
+
+
+        public float LifeTime
+        {
+            get { return lifeTime; }
+            set { lifeTime = value; }
+        }
+
+        public GUIMessage(string text, Color color, Vector2 position, float lifeTime)
+        {
+            coloredText = new ColoredText(text, color);
+            pos = position;
+            this.lifeTime = lifeTime;
+
+            size = GUI.Font.MeasureString(text);
+        }
+    }
+}