Gracefull application exit.

[Robert Rawlins]

> but mind the caveats:

Thanks Tim, the main caveat which worries me is the fact that it doesn't get
called when being killed by SIGTERM. When I look at implementing the
application as Daemon will cause complications.

The implementation looks nice and is certainly the way I would like to go,
but unless it'll work when killed by sigterm it likely won't be for me.

Thanks Tim, if you're aware of any other methods then give me a shout.

Rob