Merge branch 'f-small-doc-fixes' into 'dev'

CHANGELOG.md

src/caoscrawler/converters.py

src/caoscrawler/crawl.py

src/caoscrawler/identifiable_adapters.py

src/caoscrawler/scanner.py

src/caoscrawler/structure_elements.py

src/doc/concepts.rst

src/doc/converters.rst

src/doc/getting_started/furtherreading.rst

src/doc/getting_started/index.rst

src/doc/img/converter.png

src/doc/img/converter.svg

src/doc/macros.rst

src/doc/tutorials/index.rst

src/doc/tutorials/single_file.rst