fixed some bugs in (re)connection handling
partial droidmanager and state machine reimplementation, basic droid communication working
droid: detection and display for server shutdown
master: some cleanups
droid: communication between service and activity now provides queue for pending messages if activity not in foreground and notifications to inform the user
droid: reconnect if stream died
droid: sent message items of pending queue need to be removed
droid: StatusUpdate: added notifications for job processing
master: added checkcode switch to DroidManager
master: simple implementation of jobID
droid: service onDestroy handling
droid: droids registered during task execution are now handled correctly