Use higher level procedures in main program
`test_get_1_outerm`. Allows to output easily more information. Then in
program `test_set_max_speed` for example, we will be able to read information
about the extremum from the shapefiles instead of asking it to the
user.

And thus make the script more general and robust. Immediate
motivation: use the script on result from test `Get_1_outerm`.

Use `dbf_read_attribute_03` instead of dbfreadattribute. And then we
do not need intermediary variable `outermost_contour_ssh`nor `ISO_c_binding`.

Rename k1 to `d_init`, `k_min` to `d_min`, `k_max` to
`d_max`. Continuing the change in commit fdd8a7ea. k would be for date
index rather than number of days since 1950-1-1. As a consequence, we
also change option `-k` to `-d`, and we remove the short option for
`--dashed`.

Assume that the input shapefile collection contains a single orientation.

Trying to be more organized with these experiences, they are now
referenced in a spreadsheet.

The shapefile created from Matlab is centroid, not center, since
commit f7f43545.

Create separate collections of shapefiles for cyclones and anticyclones.

Use higher level procedures in main program unit `test_set_all_outerm`.

Preparing for two collections of shapefiles.

Preparing for two collections of shapefiles. We create the
procedure `write_nml` so we will be able to call it twice. But it
needs to access the namelist. So the namelist must be at the module level.

I do not see the point of the additional target `NetCDF_Fortran`: we
have the target `PkgConfig::NetCDF_Fortran` and we can just create an
alias `NetCDF_Fortran::NetCDF_Fortran` for
`PkgConfig::NetCDF_Fortran`.

Extract writing of `ishape_last.txt` and `grid_nml.txt` to new
procedure `write_aux`. Preparing for two collections of shapefiles.

The non-interactive test requires adding a save option to the script.

Names of NetCDF variables in AVISO files are changed: lon to
longitude, lat to latitude. As in commit b456b50e.

Cecill is adapted to French legislation. See also [Quelles différences
entre CeCILL, CeCILL-B et CeCILL-C
?](https://cecill.info/faq.fr.html#differences).

Required since commit 1eca0742.

Required since commit ed60f104.

From directory Analysis. Extract corresponding tests from
`Analysis/tests.json` into new file `Inst_eddies/Analysis/tests.json`.

Because we want to use the module parser from dateutil.

This is more robust: the default value of `max_radius_deg` remains
reasonable when we use input files with different resolutions.