Rename fletch -> dartino

tests/dartino_tests/utils.dart

 // Copyright (c) 2015, the Dart 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 file.
 
-library fletch_tests.utils;
+library dartino_tests.utils;
 
 import 'dart:async' show
     Future;
 
 import 'dart:io' show
     Directory;
 
 Future withTempDirectory(Future f(Directory)) async {
   var directory = await Directory.systemTemp.createTemp();
   try {
     return await f(directory);
   } finally {
     await directory.delete(recursive: true);
   }
 }