Update project authors statements to Dartino

tests/coroutine/yield_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';
 
 main() {
   testReturn();
   testSingleYield();
@@ skipping 26 matching lines @@
     Expect.equals(1, x);
     Expect.equals(2, Coroutine.yield(4));
     Expect.isTrue(co.isRunning);
   });
   Expect.isTrue(co.isSuspended);
   Expect.equals(4, co(1));
   Expect.isTrue(co.isSuspended);
   Expect.isNull(co(2));
   Expect.isTrue(co.isDone);
 }