Add signal management.
Add signal management.

Parrot-Developers/libARDiscovery,kradhub/libARDiscovery,kradhub/libARDiscovery,kradhub/libARDiscovery,Parrot-Developers/libARDiscovery,niavok/libARDiscovery,kradhub/libARDiscovery,Parrot-Developers/libARDiscovery,niavok/libARDiscovery,niavok/libARDiscovery,niavok/libARDiscovery,Parrot-Developers/libARDiscovery