Merge branch 'dev' into release-0.2

CHANGELOG.md

README_SETUP.md

conf/core/authtoken.example.yaml

conf/core/log4j2-debug.properties

conf/core/server.conf

conf/core/usersources.ini.template

doc/devel/Benchmarking.md

pom.xml

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

...n/java/org/caosdb/server/database/BackendTransaction.java

...se/backend/implementation/MySQL/MySQLSetFileChecksum.java

...rver/database/backend/interfaces/SetFileChecksumImpl.java

.../server/database/backend/transaction/SetFileChecksum.java

...org/caosdb/server/database/misc/TransactionBenchmark.java

...ain/java/org/caosdb/server/datatype/AbstractDatatype.java

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

src/main/java/org/caosdb/server/jobs/Job.java

...n/java/org/caosdb/server/transaction/ChecksumUpdater.java

...main/java/org/caosdb/server/utils/AsynchronousHasher.java

src/main/java/org/caosdb/server/utils/FlagInfo.java