Provide list of input files as arguments of `inst_eddies.py`,
following commit 8e0c03e1.

For programs `inst_eddies` and `test_get_1_outerm`, following commits
9a59d13 and 9dc139d.

Following commit b0e3ce55.

As for the program `inst_eddies`.

We want to generalize our possible sources of NetCDF files. We no
longer make assumptions of their filenames. And the time step may not
be the day so we cannot infer a timestep number from the filename. So
we just read a list of files as arguments and we read the first date
from standard input. We pass the date to standard input of the Fortran
executable.

Do not print default namelist, since we no longer enter the namelist
on standard input.

Read the namelist from a file instead of standard input because now we
read `days_1950` from standard input in the main program unit. When
`inst_eddies` is called by `inst_eddies.py`, `days_1950` has to be
passed at each run of `inst_eddies` by `inst_eddies.py` while the
namelist comes from out of `inst_eddies.py`. So we have to separate
the two input fluxes.

Start generalizing the processing of time: do not read time from
NetCDF file. We no longer assume that the time coordinate in the
NetCDF file is in days since 1950-1-1 and that the time step between
NetCDF files is one day. So the program `inst_eddies` can no longer
know what the date is, it just asks it to the user.

Following updates of the libraries.

The programs in this project do not depend directly on them. If they
are secondary dependencies, it is the responsibilty of the primary
dependencies to find them.

Necessary since commit 6e52178b.

Necessary since commit 6e52178b.

Necessary since commit d385d60c.

Rename variable id_child to part_id_child inside the mat files. This
is necessary since commit 6e52178b.

Following updates of the libraries.

Before input of `id_child` because reading `N_eddies` and `date_num` is
very quick, while reading `id_child` is long. So we do not waste time
if `N_eddies.mat` or `date_num.mat` are missing.

The name of the script cannot be the same as the name of a variable in
the script.

The name of the script cannot be the same as the name of a variable in
the script.

This is now a small part of the conversion to v6 for `overlap_v6.py`,
the other part being in `id_child.m`.

Only three files were left in cmake, not enough to justify a directory.

Change of philosophy. We do not force the choice of compiler options
from the project, we leave them to the user at configuration. We just
need to display a warning for the option `-ffpe-trap=invalid`.

This is nicer for the user than waiting for the error because
`my_date` is undefined .

Because the node indices do not start at 1 for the second date.