Fixed: Race Condition problem within QueuableThread (@see http://stackoverflow.com/questions/3376139/how-to-use-wait-and-notify-protocol-with-multiple-threads)
Added: single-argument constructors (with ID)
Updated: JSONUtil to use correct date format
Added: TypeReference-support to JSONURLLoaderThread
Added: TypeReference-support
Updated: KaropapierLoader (tested TypeReference-support)