Update project authors statements to Dartino

samples/general/hello.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.
 //
 // Simple Hello program. Prints Hello, and an indication of which environment
 // it was run in.
 library helloSample;
 import 'package:os/os.dart';
 
 main() {
   SystemInformation si = sys.info();
   print('Hello from ${si.operatingSystemName} running on ${si.nodeName}.');
 }