4.2.3
- added ArangoDatabase.getPermissions(String)
- added ArangoCollection.getPermissions(String)
- added ArangoDB.grantDefaultDatabaseAccess(String, Permissions)
- added ArangoDB.grantDefaultCollectionAccess(String, Permissions)
- added ArangoDatabase.grantDefaultCollectionAccess(String, Permissions)
- fixed DateUtil (thread-safe)