Merge branch 'parser' into 'master'

arkindex/dataimport/config.py

arkindex/dataimport/filetypes.py

arkindex/dataimport/iiif.py

arkindex/dataimport/models.py

arkindex/dataimport/providers.py

arkindex/dataimport/serializers.py

arkindex/dataimport/tasks/__init__.py

arkindex/dataimport/tasks/base.py

arkindex/dataimport/tasks/git.py

arkindex/dataimport/tasks/image.py

arkindex/dataimport/tasks/pdf.py

arkindex/dataimport/tests/test_gitlab_provider.py

arkindex/dataimport/tests/test_iiif.py

arkindex/dataimport/tests/test_import_pdf.py

arkindex/dataimport/tests/test_repos.py

arkindex/dataimport/tests/test_tasks.py

arkindex/images/models.py