message: ENH: add copyright to Vector class
diff: +/*
  + *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  + * Copyright (c) 2017, Lawrence Livermore National Security, LLC.
  + *
  + * Produced at the Lawrence Livermore National Laboratory
  + *
  + * LLNL-CODE-741217
  + *
  + * All rights reserved.
  + *
  + * This file is part of Axom.
  + *
  + * For details about use and distribution, please read axom/LICENSE.
  + *
  + *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  + */
  +
  #ifndef MINT_UTILS_VECTOR_HXX_
  #define MINT_UTILS_VECTOR_HXX_
  