Useful to read shapefiles from conversion of Matlab data.

Use the env keyword of `test_compare.py` rather than setting env on
the command line. This seems a little clearer and it allows us to
remove the stdout line in the test description. The possibility to add
env was added to `test_compare.py` in commit 4964d767 of the
`Test_compare` repository, after replacing mpiexec by `$mpiexec` in
`eddy_graph.sh`, in commit 850efa4b of the present repository.

Generalize `eddy_graph.sh` to accept several SHPC on the command line.

We can make a symbolic link or copy to `$large_input_dir`.

In particular for several SHPC.

Generalize `test_read_snapshot` to accept several SHPC onthe command line.

This `accept.py` also serves as an example for a module accept
accompanying the script `filter.py`.

Use the first date of the SHPC as default date to read.

Because we are going to use the first date from hshp as a default date
to read.

Avoid an exception later in function snapshot.

Avoid calling hunt in that case.

See commit a86422ee.

Read name of input SHPC for program `test_read_eddy` from the command line.

The field name was incorrect since commit 055c0755.

The bug was introduced in commit b3615f59.

Following modifications of `CMakeLists.txt` files.

With `target_sources` rather than referring to their path from another
directory.

With `target_sources` rather than referring to their path from another
directory.

With `target_sources` rather than referring to their path from another
directory.

It was difficult to find the `CMakeLists.txt` that controlled the the
compilation of a given file from the message of a compilation error.