Removed NioTSO client and server

- NioTSO client isn't needed because we're using RayLib
- Added FreeSO's API server to handle most backend operations

server/tso.common/MeshSimplify/MSVertex.cs

@@ -0,0 +1,13 @@
+using Microsoft.Xna.Framework;
+
+namespace FSO.Common.MeshSimplify
+{
+    public class MSVertex
+    {
+        public Vector3 p;
+        public Vector2 t; //texcoord
+        public int tstart, tcount;
+        public SymmetricMatrix q;
+        public bool border;
+    }
+}