Update project authors statements to Dartino

pkg/fletchc/lib/src/verbs/x_upgrade_verb.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.
 
 library fletchc.verbs.x_upgrade_verb;
 
 import 'infrastructure.dart';
 import '../worker/developer.dart' show upgradeAgent;
 import 'documentation.dart' show upgradeDocumentation;
 
 const Action upgradeAction = const Action(
@@ skipping 14 matching lines @@
 
   UpgradeTask(this.base, this.package);
 
   Future call(
       CommandSender commandSender,
       StreamIterator<ClientCommand> commandIterator) async {
         return await upgradeAgent(commandSender, commandIterator,
             SessionState.current, base, package);
   }
 }