Updated documentation.

docs/source/cnes_logo.png

docs/source/configuration.rst

docs/source/credits.rst

docs/source/espace-dev_logo.jpg

docs/source/examples.rst

docs/source/index.rst

docs/source/installation.rst

docs/source/ird_logo.png

docs/source/library.rst

docs/source/logos.png

docs/source/package_content.rst

docs/source/sen2cor.rst

sen2chain/automatization.py

sen2chain/cloud_mask.py

sen2chain/colormap.py

sen2chain/config.py

sen2chain/data_request.py

sen2chain/data_request_OLD.py

sen2chain/download_and_process.py

sen2chain/geo_utils.py