Executor as Threadpool to EventBus
Message is now Comparable
code clean-up
changed BlockingQueue to a synchronized TreeSet (auto-sort \o/)
removed debug
added host Tab
Timestamp embedded in NewNotificationEvent
removed debug output
added translation string for host tab
fixed display on host tab
increased message buffer
only one eventbus thread for now (problems with dispatching)
added button for shutdown of server
combinet target actions to single class
added EXIT MessageType
wired shutdown to event