REL: prepare release

CMakeLists.txt

conanfile.py

include/caosdb/connection.h

include/caosdb/entity.h

include/caosdb/status_code.h

include/ccaosdb.h

proto

src/caosdb/configuration.cpp

src/caosdb/logging.cpp

src/caosdb/status_code_description.cpp

src/ccaosdb.cpp

src/cxxcaosdbcli.cpp

test/test_ccaosdb.cpp

test/test_file_transmission.cpp

test/test_transaction.cpp

test_package/conanfile.py