Added FSO.Files for use with the API server

Don't ask me. FreeSO is the prime example of dependency hell.

server/tso.files/Formats/IFF/Chunks/FSOV.cs

@@ -0,0 +1,36 @@
+using FSO.Files.Utils;
+using System.IO;
+
+namespace FSO.Files.Formats.IFF.Chunks
+{
+    /// <summary>
+    /// A simple container for FSOV data within an iff. If this exists, normal TS1 iff loading is subverted.
+    /// </summary>
+    public class FSOV : IffChunk
+    {
+        public static int CURRENT_VERSION = 1;
+        public int Version = CURRENT_VERSION;
+        public byte[] Data;
+
+        public override void Read(IffFile iff, Stream stream)
+        {
+            using (var io = IoBuffer.FromStream(stream, ByteOrder.LITTLE_ENDIAN))
+            {
+                Version = io.ReadInt32();
+                var length = io.ReadInt32();
+                Data = io.ReadBytes(length);
+            }
+        }
+
+        public override bool Write(IffFile iff, Stream stream)
+        {
+            using (var io = IoWriter.FromStream(stream, ByteOrder.LITTLE_ENDIAN))
+            {
+                io.WriteInt32(Version);
+                io.WriteInt32(Data.Length);
+                io.WriteBytes(Data);
+            }
+            return true;
+        }
+    }
+}