rework text subtitles

MediaBrowser.Model/LiveTv/ChannelQuery.cs

@@ -17,5 +17,17 @@ namespace MediaBrowser.Model.LiveTv
         /// </summary>
         /// <value>The user identifier.</value>
         public string UserId { get; set; }
+
+        /// <summary>
+        /// Skips over a given number of items within the results. Use for paging.
+        /// </summary>
+        /// <value>The start index.</value>
+        public int? StartIndex { get; set; }
+
+        /// <summary>
+        /// The maximum number of items to return
+        /// </summary>
+        /// <value>The limit.</value>
+        public int? Limit { get; set; }
     }
 }