Add HDF5 ClusterOutputInfo constructor

    const mixMPI *mpidata, int first_xi = 1, int xi_length = 0

  );

  /*! \brief `ClusterOutputInfo` constructor from HDF5 input.

   *

   * \param hdf5_file_name: `const string &` Path to the HDF5 file to be read.

   */   

  ClusterOutputInfo(const std::string &hdf5_file_name);

  /*! \brief `ClusterOutputInfo` instance destroyer.

   */

  ~ClusterOutputInfo();