Feature request: add cli mode

[MiniAvarec]

Is it possible to add cli-mode of script?
This request is somehow related to issue #37 , where if you are connecting to device via WiFi and launch script - you will lose your devices.

It would be great if launch options could be passed via parameters.
For example:

1. Get list of nearby WLANs

python3 attack_tool.py -i wlan1 --scan --timeout 60

And after 60 seconds it will produce static output with all found WLANs.
2. If you want to sniff any network:

python3 attack_tool.py -i wlan1 --hanshakes --essid(--bssid) <name> 

After this it will generate files with handshakes or PMKIDs