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/AbstractIffChunk.cs

@@ -0,0 +1,51 @@
+using System.IO;
+
+namespace FSO.Files.Formats.IFF
+{
+    /// <summary>
+    /// An IFF is made up of chunks.
+    /// </summary>
+    public abstract class IffChunk 
+    {
+        public ushort ChunkID;
+        public ushort ChunkFlags;
+        public string ChunkType; //just making it easier to access
+        public string ChunkLabel;
+        public bool ChunkProcessed;
+        public byte[] OriginalData; //IDE ONLY: always contains base data for any chunk.
+        public ushort OriginalID;
+        public bool AddedByPatch;
+        public string OriginalLabel;
+        public byte[] ChunkData;
+        public IffFile ChunkParent;
+
+        public ChunkRuntimeState RuntimeInfo = ChunkRuntimeState.Normal;
+
+        /// <summary>
+        /// Reads this chunk from an IFF.
+        /// </summary>
+        /// <param name="iff">The IFF to read from.</param>
+        /// <param name="stream">The stream to read from.</param>
+        public abstract void Read(IffFile iff, Stream stream);
+
+        /// <summary>
+        /// The name of this chunk.
+        /// </summary>
+        /// <returns>The name of this chunk as a string.</returns>
+        public override string ToString()
+        {
+            return "#" + ChunkID.ToString() + " " + ChunkLabel;
+        }
+
+        /// <summary>
+        /// Attempts to write this chunk to a stream (presumably an IFF or PIFF)
+        /// </summary>
+        /// <param name="iff"></param>
+        /// <param name="stream"></param>
+        /// <returns>True if data has been written, false if not. </returns>
+        public virtual bool Write(IffFile iff, Stream stream) { return false; }
+
+        public virtual void Dispose() { }
+
+    }
+}