Update project authors statements to Dartino

tests/unsorted/spawn_test.dart

-// Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
+// 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 'package:expect/expect.dart';
 
 bool inMain = false;
 
 foo() {
   Expect.isFalse(inMain);
 }
 
 void main() {
   inMain = true;
   Process.spawnDetached(foo);
 }