Move DFD to new class

SabreTools.DatFiles/DatTool.cs

@@ -0,0 +1,22 @@
+using SabreTools.Logging;
+
+// TODO: What sort of internal state should this have? Would a single DatFile be appropriate?
+// TODO: How much of the stuff currently in DatFile should be moved here?
+// TODO: Can things like CreateAndParse be moved here?
+namespace SabreTools.DatFiles
+{
+    /// <summary>
+    /// Represents a format-agnostic DAT
+    /// </summary>
+    public partial class DatTool
+    {
+        #region Logging
+
+        /// <summary>
+        /// Logging object
+        /// </summary>
+        protected Logger logger;
+
+        #endregion
+    }
+}