Update project authors statements to Dartino

pkg/mdns/lib/src/native_extension_client.dart

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 library mdns.src.native_extension_client;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
 
 import 'package:mdns/mdns.dart';
@@ skipping 131 matching lines @@
   await native_extension_api.loadLibrary();
   SendPort service = native_extension_api.servicePort();
   ReceivePort port = new ReceivePort();
   try {
     service.send([port.sendPort, RequestType.echoRequest.index, message]);
     return await port.first;
   } finally {
     port.close();
   }
 }