new updates based on experience with pulp2-folding pipeline

docker/workflow/Dockerfile

docs/source/_static/workflow-redigitization.dot

docs/source/conf.py

docs/source/overview.rst

scripts/create-input-json-pulp2-redigitization.sh

scripts/lofar_bf_h5info.py

steps/digitize.cwl

steps/get_cobalt_parset_and_log.cwl

steps/keep_h5.cwl

steps/make_outdir.cwl

tests/README.md

tests/digitize_das6_input.json

tests/digitize_input.json

workflows/pulp2-xxyy-8bit-requantisation.cwl