Storing MAC addresses for future WOL use

[slackline]

Just discovered Port Authority and love how fast it is.

I found #74

I could do something like store the discovered hosts in the local DB and display them whenever a user is back on the same network. Detection of the right network could use the BSSID, though that wouldn't work for #76

I was wondering if this aspect was ever addressed? It seems you need to know the MAC address to use WOL and typically I don't have that to hand or available from a port scan because the device I want to wake up is asleep. It would be useful if once having scanned a network the MAC address' are stored and could be selected as targets for WOL. Another option might be to allow users to send WOL to a device that is already awake and then store those as a list of devices for future use.