Merge branch 'f-select-acl' into 'dev'

...se/backend/transaction/RetrieveFullEntityTransaction.java

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

...org/caosdb/server/entity/xml/EntityToElementStrategy.java

src/main/java/org/caosdb/server/query/POV.java

src/main/java/org/caosdb/server/query/Query.java

src/main/java/org/caosdb/server/transaction/Retrieve.java

src/main/java/org/caosdb/server/transaction/UpdateACL.java

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

.../database/backend/transaction/RetrieveFullEntityTest.java