Update project authors statements to Dartino

tests/unsorted/dart2js_hello_world_test.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 test.dart2js_hello_world;
 
 import 'dart2js_helper.dart';
 
 main() {
   var source = """
     void main() {
       print('Hello World');
     }""";
   compileScript(source);
 }