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/IffRuntimeInfo.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+
+namespace FSO.Files.Formats.IFF
+{
+    public class IffRuntimeInfo
+    {
+        public IffRuntimeState State;
+        public IffUseCase UseCase;
+        public string Filename;
+        public string Path;
+        public bool Dirty;
+        public List<IffFile> Patches = new List<IffFile>();
+    }
+
+    public enum IffRuntimeState
+    {
+        ReadOnly, //orignal game iff
+        PIFFPatch, //replacement patch
+        PIFFClone, //clone of original object
+        Standalone //standalone, mutable iff
+    }
+
+    public enum IffUseCase
+    {
+        Global,
+        Object,
+        ObjectSprites,
+    }
+}