Rename fletch -> dartino

tests/unsorted/shared_immutable_data_test.dart

 // 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.
 
-import 'dart:fletch';
+import 'dart:dartino';
 
 import 'package:expect/expect.dart';
 import 'package:immutable/immutable.dart';
 
 const int INSERTS_PER_PROCESS = 1000;
 const int NUM_PROCESSES = 500;
 
 // This function:
 //   * inserts [INSERTS_PER_PROCESS/2] numbers into a tree
 //     * sends the tree to a child process
@@ skipping 37 matching lines @@
   for (int i = 0; i < NUM_PROCESSES * INSERTS_PER_PROCESS; i++) {
     Expect.equals(i, modifiedTree.lookup(i));
   }
 }
 
 assertIsTree(value) {
   if (value is! RedBlackTree) {
     throw 'Expected to get a tree from child, but got exit message';
   }
 }