+ Error fixing
+ Test adaption (FileEventManagerTest should now work without any
problems)
+ Added a flag to FolderComposite / FileLeaf to indicate if it was
uploaded to the DHT or not. (to distinguish create>delete>create from
create [upload] > delete > create <=> move detection)

+ deletedFileComponents correctly updated (in case of detected move)

+ Synchronized the part in which the ActionExecutor manipulates the
queue