Update project authors statements to Dartino

src/vm/refcounted.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_REFCOUNTED_H_
 #define SRC_VM_REFCOUNTED_H_
 
 #include "src/shared/globals.h"
 #include "src/shared/atomic.h"
 
 namespace fletch {
@@ skipping 16 matching lines @@
     }
   }
 
  private:
   Atomic<int> ref_count_;
 };
 
 }  // namespace fletch
 
 #endif  // SRC_VM_REFCOUNTED_H_