add methods to get quality options

MediaBrowser.Model/Sync/SyncQualityOption.cs

@@ -13,5 +13,10 @@ namespace MediaBrowser.Model.Sync
         /// </summary>
         /// <value>The identifier.</value>
         public string Id { get; set; }
+        /// <summary>
+        /// Gets or sets a value indicating whether this instance is default.
+        /// </summary>
+        /// <value><c>true</c> if this instance is default; otherwise, <c>false</c>.</value>
+        public bool IsDefault { get; set; }
     }
 }