Separate out TrackTypeValue

RedBookPlayer/TrackTypeValue.cs

@@ -0,0 +1,12 @@
+namespace RedBookPlayer
+{
+    /// <summary>
+    /// Track type for determining how to handle
+    /// </summary>
+    /// <remarks>Does not distinguish between different data track types</remarks>
+    public enum TrackTypeValue
+    {
+        Audio,
+        Data
+    }
+}