Added IsFolder sort order

MediaBrowser.Server.Implementations/Sorting/IsFolderComparer.cs

@@ -0,0 +1,39 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Sorting;
+using MediaBrowser.Model.Querying;
+
+namespace MediaBrowser.Server.Implementations.Sorting
+{
+    public class IsFolderComparer : IBaseItemComparer
+    {
+        /// <summary>
+        /// Compares the specified x.
+        /// </summary>
+        /// <param name="x">The x.</param>
+        /// <param name="y">The y.</param>
+        /// <returns>System.Int32.</returns>
+        public int Compare(BaseItem x, BaseItem y)
+        {
+            return GetValue(x).CompareTo(GetValue(y));
+        }
+
+        /// <summary>
+        /// Gets the value.
+        /// </summary>
+        /// <param name="x">The x.</param>
+        /// <returns>System.String.</returns>
+        private int GetValue(BaseItem x)
+        {
+            return x.IsFolder ? 0 : 1;
+        }
+
+        /// <summary>
+        /// Gets the name.
+        /// </summary>
+        /// <value>The name.</value>
+        public string Name
+        {
+            get { return ItemSortBy.Album; }
+        }
+    }
+}