Update project authors statements to Dartino

src/vm/event_handler_posix.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.
 
 #if defined(FLETCH_TARGET_OS_POSIX)
 
 #include "src/vm/event_handler.h"
 
 #include <unistd.h>
 
 namespace fletch {
 
 void EventHandler::Interrupt() {
   int* fds = reinterpret_cast<int*>(data_);
   char b = 0;
   TEMP_FAILURE_RETRY(write(fds[1], &b, 1));
 }
 
 }  // namespace fletch
 
 #endif  // FLETCH_TARGET_OS_POSIX