Added critic rating as a sort order

MediaBrowser.Server.Implementations/Sorting/CriticRatingComparer.cs

@@ -0,0 +1,32 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Sorting;
+using MediaBrowser.Model.Querying;
+
+namespace MediaBrowser.Server.Implementations.Sorting
+{
+    /// <summary>
+    /// Class CriticRatingComparer
+    /// </summary>
+    public class CriticRatingComparer : 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 (x.CriticRating ?? 0).CompareTo(y.CriticRating ?? 0);
+        }
+
+        /// <summary>
+        /// Gets the name.
+        /// </summary>
+        /// <value>The name.</value>
+        public string Name
+        {
+            get { return ItemSortBy.CriticRating; }
+        }
+    }
+}