WIP: file storage refactoring: directory

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

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

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

...main/java/org/caosdb/server/filesystem/FSODescriptor.java

...va/org/caosdb/server/filesystem/FileStorageInterface.java

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

...ava/org/caosdb/server/filesystem/FileSystemInterface.java

...n/java/org/caosdb/server/filesystem/LocalFileStorage.java

...osdb/server/filesystem/VirtualFSODescriptorInterface.java

...main/java/org/caosdb/server/jobs/core/AutoCreateDirs.java

.../caosdb/server/jobs/core/CheckFileStorageConsistency.java

src/main/java/org/caosdb/server/query/CQLLexer.g4

src/main/java/org/caosdb/server/query/CQLParser.g4

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