Merge branch 'dev' into f-new-debug-tree

src/doc/getting_started/index.rst

src/doc/getting_started/optionalfeatures.rst

src/doc/how-to-upgrade.md

src/doc/img/converter.png

src/doc/img/converter.svg

src/doc/img/properties-from-dict-records-author.png

src/doc/img/properties-from-dict-records-person.png

src/doc/index.rst

src/doc/macros.rst

src/doc/tutorials/index.rst

src/doc/tutorials/parameterfile.rst

src/doc/tutorials/single_file.rst

tox.ini

unittests/broken_cfoods/broken_record_from_dict.yml

unittests/broken_cfoods/broken_record_from_dict_2.yml

unittests/datamodels/datamodel.yaml

unittests/eln_cfood.yaml

unittests/eln_files/PASTA.eln

unittests/eln_files/records-example.eln

unittests/example_cfood.yml