Merge branch '111-fname_fmt-concatenation-prevents-detection-of-s2-products-already-generated' into 'develop'

Resolve "fname_fmt.concatenation prevents detection of S2 products already generated"

Closes #111

See merge request !72

Resolve "Add a NOTICE file"

Closes #26

See merge request !71

Resolve "No data management"

Closes #87

See merge request !69

- incorrect metadata type for GDAL
- incorrect parameter name for band math
- missing StepFactory to import

Resolve "Permit to append "GDAL metadata" on the fly"

Closes #25

See merge request !68

Make sure the clear the "cache" before testing

We don't change the baseline yet, but instead we specify exactly what is
expected in the test case

- ACQUISITION_DATETIME_{i}
- ACQUISITION_DATETIME for concat products (regression fixed)
- s/MNT/DEM
- TIFFTAG_IMAGEDESCRIPTION
- DATA_TYPE for tmp/S2 and _LIA files (still incorrect for tmp/S1)
- DATETIME formats harmonized
- LIA_FILE (stripped from the directory name)
- s/LIA Angle/LIA
- s/beta/normlim in final product

Resolve "Integrate computation of Local Incidence Angle"

Closes #56

See merge request !45

Because we're using "example table" feature which has been removed from V 6.0.0
onward. See: https://pytest-bdd.readthedocs.io/en/latest/#migration-from-5-x-x

... to make sure dask[distributed] has some bug fixed.

Still to do:

- test in non dry-run mode
- update baseline meta data
- check TIFFTAG_IMAGEDESCRIPTION are expressive and good enough
- complete mocked tests

- x8-x10 speed-up
- UB fixed
- compute XYZ cartesian coordinates even in shadows

See
normlim_sigma0!1

and keep it in float32 before orthorectification