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.

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.

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.

I do not see a better way than to ask the user to provide the template
of basename as an additional argument. We cannot do as in
`Convert_Matlab/inst_eddies_v6.py`, that is try a list of templates,
because here the file names could be anything.

So we no longer have to create a symbolic link when we run
`inst_eddies.py`.

Preparing for configuration of location of binary executable.

`cropped.nc` does not exist if not `args.bbox`.

Better to check this before the creation of all the temporary files
and links, so the user does not have to clean them up before running
again.

Following update of libraries: NetCDF-Fortran is private in NetCDF95
and MPI-Fortran is private in EZMPI.

New script to loop on detection of instantaneous eddies.

Makes it easier to log. This does not make more instructions because
 now we do not need to try creating `SHP_triplet/extremum.dbf`.

Homogenize with other dates, preparing for a loop.

We need this for test `Successive_overlap_periodic`.

We need this for the test `Extraction_eddies_periodic`, which serves
as input for the test `Successive_overlap_periodic`.