Merge branch 'release-0.6' into f-grpc-f-acm

.gitlab-ci.yml

CHANGELOG.md

DEPENDENCIES.md

FEATURES.md

README_SETUP.md

RELEASE_GUIDELINES.md

caosdb-proto

caosdb-webui

pom.xml

src/doc/DEPENDENCIES.md

src/doc/conf.py

src/doc/index.rst

src/main/java/org/caosdb/server/FileSystem.java

src/main/java/org/caosdb/server/datatype/CaosEnum.java

src/main/java/org/caosdb/server/entity/Entity.java

src/main/java/org/caosdb/server/entity/EntityInterface.java

src/main/java/org/caosdb/server/entity/FileProperties.java

src/main/java/org/caosdb/server/entity/Message.java

.../caosdb/server/entity/container/TransactionContainer.java

.../java/org/caosdb/server/entity/wrapper/EntityWrapper.java