Merge branch 'dev' into f-parse-string-values

.gitlab-ci.yml

CHANGELOG.md

doc/Examples.rst

include/caosdb/transaction.h

include/ccaosdb.h

src/caosdb/transaction.cpp

src/ccaosdb.cpp

src/cxxcaosdbcli.cpp

test/test_ccaosdb.cpp

test/test_transaction.cpp