Update project authors statements to Dartino

tests/pkg/file/file_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() {
   testOpen();
@@ skipping 47 matching lines @@
   Expect.equals(0, file.length);
   file.position = 0;
   Expect.equals(0, file.position);
   file.position = 1;
   Expect.equals(1, file.position);
   Expect.equals(0, file.length);
 
   file.close();
   File.delete(file.path);
 }