Update project authors statements to Dartino

src/vm/message_mailbox.cc

-// 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.
 
 #include "src/vm/message_mailbox.h"
 #include "src/vm/process.h"
 
 namespace fletch {
 
 ExitReference::ExitReference(Object* message) : message_(message) {}
 
@@ skipping 37 matching lines @@
   EnqueueEntry(entry);
 }
 
 void MessageMailbox::EnqueueExit(Process* sender, Port* port, Object* message) {
   uint64 address = reinterpret_cast<uint64>(message);
   Message* entry = new Message(port, address, 0, Message::IMMUTABLE_OBJECT);
   EnqueueEntry(entry);
 }
 
 }  // namespace fletch