slf_diff

usage: slf_diff.py [-h] [--force] [--verbose] [--velMag]
                   inname1 inname2 outname

@brief:
Calcule la différence entre inname1 et inname2 pour chaque variable et enregitrement communs

@prerequisites:
Les maillages sont identiques (tableaux x, y, ikle, ipobo)

positional arguments:
  inname1        reference Serafin input filename
  inname2        Serafin input filename to subtract
  outname        Serafin output filename

options:
  -h, --help     show this help message and exit
  --force, -f    force output overwrite (default: False)
  --verbose, -v  increase output verbosity (default: False)
  --velMag       compute velocity 2D (or 3D) difference instead of a simple
                 difference for U, V (and W) (default: False)