Update project authors statements to Dartino

tests/isolate/isolate_fib_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.
 
 import 'package:isolate/isolate.dart';
 import 'package:expect/expect.dart';
 
 main() {
   Expect.equals(4181, fib(18));
 }
 
 fib(n) {
   if (n <= 1) return 1;
   var n1 = Isolate.spawn(() => fib(n - 1));
   var n2 = Isolate.spawn(() => fib(n - 2));
   return n1.join() + n2.join();
 }