Merge branch 'master' into feature/text

.gitignore

.gitlab-ci.yml

Makefile.am

configure.ac

docs/Makefile.am

docs/commit_messages.txt

docs/css/manual.css

docs/css/reset.css

docs/css/style.css

docs/sefht.texi

gitlab-ci/release.sh.in

gitlab-ci/save_timestamps.sh

gitlab-ci/upload.sh.in

sefht.geany

src/lib/Makefile.am

src/lib/sefht/data.c

src/lib/sefht/data.h

src/lib/sefht/fragment_class.c

src/lib/sefht/node_fragment.c

src/lib/sefht/status.h