Allow specifying multiple network interfaces

[cjbassi]

Currently, only 1 network interface can be selected with the -i option, but it would be nice to be able to specify a list of interfaces.

[mattLLVW]

Hey @cjbassi I'm implementing this and possibly #149 at the same time, but docopt can't use options with multiple argument.

I think there's two options here:

• Repeating the interfaces (and maybe specify excluded):

gotop -i wlp2s0 -i br-aad9862f577f -e tun0

Or:

• Specify a list(split on ',' and remove from stats on '!'):

gotop -i wlp2s0,br-aad9862f577f,!tun0

What do you think?

[cjbassi]

Hey thanks for working on this. I was thinking the second option, that seems more ergonomic to me.