Application can run only once

Signed-off-by: chmod <chmod@liss-e.gr>
Updatedevice list so to catch unplug

Signed-off-by: chmod <chmod@liss-e.gr>
only startup activity listens for usb events

Signed-off-by: chmod <chmod@liss-e.gr>
re-put pro fragment back

Signed-off-by: chmod <chmod@liss-e.gr>