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/FSO.Server.Common/ServerVersion.cs

@@ -0,0 +1,48 @@
+using System.IO;
+
+namespace FSO.Server.Common
+{
+    public class ServerVersion
+    {
+        public string Name;
+        public string Number;
+        public int? UpdateID;
+
+        public static ServerVersion Get()
+        {
+            var result = new ServerVersion()
+            {
+                Name = "unknown",
+                Number = "0"
+            };
+
+            if (File.Exists("version.txt"))
+            {
+                using (StreamReader Reader = new StreamReader(File.Open("version.txt", FileMode.Open, FileAccess.Read, FileShare.Read)))
+                {
+                    var str = Reader.ReadLine();
+                    var split = str.LastIndexOf('-');
+
+                    result.Name = str;
+                    if (split != -1)
+                    {
+                        result.Name = str.Substring(0, split);
+                        result.Number = str.Substring(split + 1);
+                    }
+                }
+            }
+
+            if (File.Exists("updateID.txt"))
+            {
+                var stringID = File.ReadAllText("updateID.txt");
+                int id;
+                if (int.TryParse(stringID, out id))
+                {
+                    result.UpdateID = id;
+                }
+            }
+
+            return result;
+        }
+    }
+}