Merge branch 'f-get-by' into 'dev'

integrationtests/test_issues.py

integrationtests/test_realworld_example.py

integrationtests/test_use_case_simple_presentation.py

setup.cfg

src/caoscrawler/crawl.py

src/caoscrawler/identifiable.py

src/doc/concepts.rst

unittests/test_tool.py