Add specifying IP ranges with dashes

[paolosezart]

You have a very nice and easy to use port scanner. I would like to add the ability to specify a range of IP addresses with dashes, for example 192.168.1.1-192.168.1.80, 192.168.2.1-192.168.3.255
As well as listing ports, e.g. 80, 443, 5900-5910.
Thanks for your program!