Hid some more triplets.

NTwain/ITwainSession.cs

@@ -96,5 +96,12 @@ namespace NTwain
         /// <param name="session">The session.</param>
         /// <returns></returns>
         TWStatus GetStatus();
+
+        /// <summary>
+        /// Gets the manager status. Only call this at state 3 or higher.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <returns></returns>
+        TWStatusUtf8 GetStatusUtf8();
     }
 }