Update project authors statements to Dartino

tests/pkg/file/stdio_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 'dart:typed_data';
 
 import 'package:expect/expect.dart';
 import 'package:file/file.dart';
 
 void main() {
   testStdio();
 }
 
 void testStdio() {
   Expect.isNotNull(File.stdin);
   Expect.equals(0, File.stdin.fd);
   Expect.isNotNull(File.stdout);
   Expect.equals(1, File.stdout.fd);
   Expect.isNotNull(File.stderr);
   Expect.equals(2, File.stderr.fd);
 }