Rename fletch -> dartino

tests/unsorted/messaging_port_lifetime_test.dart

 // Copyright (c) 2014, 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.
 
 import 'dart:async';
-import 'dart:fletch';
+import 'dart:dartino';
 
 import 'package:expect/expect.dart';
 
 main(arguments) {
   var forceGC = arguments.length == 1 ? arguments[0] : null;
   var channel = new Channel();
   var port = new Port(channel);
   Process.spawnDetached(() => otherProcess(port));
   var replyPort = channel.receive();
   replyPort.send(forceGC);
@@ skipping 18 matching lines @@
   // the port are in the queue.
   new Timer(const Duration(milliseconds: 10), () {
     var forceGC = channel.receive();
     for (int i = 0; i < 3; i++) {
       var port = channel.receive();
       port.send(i);
     }
     if (forceGC != null) forceGC();
   });
 }