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/Events/RepairTask.cs

@@ -0,0 +1,20 @@
+namespace Barotrauma
+{
+    class RepairTask : Task
+    {
+        Item item;
+
+        public RepairTask(Item item, float priority, string name)
+            : base(priority, name)
+        {
+            if (taskManager == null) return;
+
+            this.item = item;
+        }
+
+        public override void Update(float deltaTime)
+        {
+            if (item.Condition > 50.0f) Finished();
+        }
+    }
+}