Update project authors statements to Dartino

src/vm/message_mailbox.h

-// 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.
 
 #ifndef SRC_VM_MESSAGE_MAILBOX_H_
 #define SRC_VM_MESSAGE_MAILBOX_H_
 
 #include "src/shared/globals.h"
 #include "src/shared/atomic.h"
 
 #include "src/vm/heap.h"
@@ skipping 90 matching lines @@
   void MergeAllChildHeaps(Process* destination_process);
 
  private:
   void MergeAllChildHeapsFromQueue(Message* queue,
                                    Process* destination_process);
 };
 
 }  // namespace fletch
 
 #endif  // SRC_VM_MESSAGE_MAILBOX_H_