Function to set de values of a variable with an ASCII file (common Fortran-like format)
setvar_asciivalues(values, ncfile, varname)
values= asciifile: ASCII file with a Fortran-like structure ('#' for commentaries)
[dim1]_1 [[dim2]_1 ... [dim2]_M]
...
[dim1]_N
NOTE: for character values, use '!' for space
ncfile= netCDF file to use
varname= variable to use
$ python ${pyHOME}/nc_var.py -o setvar_asciivalues -S 'nombres_zonas.dat' -f SouthAm_Climzones.nc -v regionn