Feature Request: Discover "Stop" command

[johnc2k]

As per the title, would be useful to be able to stop the discover scan as in a Logitech rich environment it can be difficult to see the output of the devices list :)

[nieldk]

Great idea, but how about a more general 'pause' command, to pause all ongoing attacks, scans etc ?

[sogewasp]

Added in #44 Waiting merge