Invert order of dummy arguments of procedure `read_grid`.

Use `uniform_lon_lat` from modules `input_ssh_m` or `read_grid_m` to
compute actual argument of `shpc_create`.

In program `test_read_eddy`.

Replace dummy argument `grid_lon_lat` of procedure `shpc_create` by
`with_proj`.

Specify whether to read shapefile `extr_proj` in procedure `shpc_open`
instead of just trying to read this shapefile. Use `uniform_lon_lat`
to decide whether to read the shapefile. As `shpc_open` is called in
both programs `inst_eddies` and `eddy_graph`, we cannot access
variable `uniform_lon_lat` of module `input_ssh_m`, which is not used
in program `eddy_graph`, nor variable `uniform_lon_lat` of module
`read_grid_m`, which is not used in program `inst_eddies`. So we add a
dummy argument `with_proj` to procedure `shpc_open`.

Replace argument `s` of `write_snapshot` by its component `list`.

Move part of tests to new test series in sub-directory.

Rather than from current series of tests.

Move Python scripts to new sub-directory `Analysis`.

Move component extraction functionality to new script
`extract_component_nx.py`. For clarity.

So we can run only individual tests if we want.

Following the  move of `extract_component.py`.

Instead of using old result from Matlab. And run on cyclones instead
of anticyclones, why not, just one less entry in the namelist.

copy was undefined. The bug came from commit 7f24341b.

Dictionary instead of list, following update of `test_compare.py`.

There is not much point in keeping a separate experience for
2006/1/1-2006/15/1.

We also change the rule on the input value of `n_dates`. Before we could
have a finite value of `n_dates` if there was a single slice. Now if
we want a finite value of `n_dates` then we have to specify a slice,
even if there is only one. This seems clearer.

There is not much point in keeping a separate experience for
2006/1/1-2006/15/1.

Use out_cont%closed instead.

`Inst_eddies_12` uses the current revision and so does not contain
invalid eddies.

Move test `R4_15_splitted` before the tests that use it.

Instead of `Inst_eddies_10_splitted`.