minor tweaks and comment fixes

    stopthresh = stop balancing when this imbalance threshhold is reached

  rcb args = none :pre

zero or more keyword/value pairs may be appended :l

keyword = {out} or {group} :l

keyword = {out} or {clock} or {group} :l

  {out} value = filename

    filename = write each processor's sub-domain to a file, at each re-balancing

  {clock} value = weight

#if BALANCE_DEBUG

    if (me == 0) {

      printf("clock imbalance scaled using factor %g\n",factor);

      fprintf(stderr,"Clock imbalance using factor %g\n",factor);

      for (int i = 0; i < nprocs; ++i)

        printf(" % 2d: %4.2f",i,clock_imbalance[i]);

      puts("");

        fprintf(stderr," % 2d: %4.2f",i,clock_imbalance[i]);

      fputs("\n",stderr);

    }

#endif

}

/* ----------------------------------------------------------------------

   calculate imbalance based on (weighted) nlocal

   calculate imbalance based on (weighted) local atom counts

   return max = max atom per proc

   return imbalance factor = max atom per proc / ave atom per proc

------------------------------------------------------------------------- */

  for (int i = 0; i < nlocal; i++)

    weights[i] = getcost(i)*factor;

  //rcb->compute(dim,atom->nlocal,atom->x,NULL,boxlo,boxhi);

  rcb->compute(dim,atom->nlocal,atom->x,weights,shrinklo,shrinkhi);

  rcb->invert(sortflag);

  delete[] weights;