DOC STY: Some documentation, typos, ...

CHANGELOG.md

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

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

...ava/org/caosdb/server/database/DatabaseAccessManager.java

...org/caosdb/server/entity/container/WritableContainer.java

...in/java/org/caosdb/server/jobs/core/InsertFilesInDir.java

.../java/org/caosdb/server/transaction/WriteTransaction.java

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