Rename fletch -> dartino

tests/unsorted/messaging_many_process_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:fletch';
+import 'dart:dartino';
 
 import 'package:expect/expect.dart';
 
 const int PROCESSES = 2000;
 const int MESSAGES = 200;
 
 void main() {
   var channels = new List(PROCESSES);
   Stopwatch watch = new Stopwatch()..start();
   for (int i = 0; i < PROCESSES; i++) {
@@ skipping 24 matching lines @@
 
 void portResponder(Port output) {
   Channel input = new Channel();
   output.send(new Port(input));
   int message;
   do {
     message = input.receive();
     output.send(message - 1);
   } while (message > 0);
 }