Remove IP-based topic voting

[cbojar]

Redo the topic voting system to not be tied to IP so multiple people on the same connection can vote.

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[s0ph0s-2]

I was talking to someone about this the other day. What if JBot asked you to put in your IRC nick, then PMed you to confirm? It could then set a cookie to maintain that authorization until the end of the browser session.
The issue I foresee with this is that not everyone who votes is also on IRC, and this solution would exclude those people.

[rikai]

@s0ph0s-2 Honestly, like most of the other issues on here, i think the real solution is to add an auth/login system (would also help with the whole admin frontend thing)

Something like omniauth+devise+cancan or somesuch. It's been talked about many times, but nobody has had the time to implement it, which is sad, because it's a blocker for a large amount of the things we can potentially do. :/