Improve skip vote system

[za3k]

The current skip vote system is a hardcoded number, 3. This really kind of sucks--I play on FCN, and there still are never enough people voting to skip. It ranges from 0-1 players at night, to maybe 5 during peak hours.

Perhaps you can count the unique people guessing in say, the last 10 minutes, and set the number of skips needed to MIN(guessers, 3)

[rawsonj]

I really don't have much time these days to work on this, which is why several issues have been raised with me going "yep, I'll get to that" and no other activity.

Though you will note I am responsive to PR's and comments, so if you implement this and submit a PR, I'll gladly review and merge it.

[za3k]

We'll see! I think the changes are easy but getting the bot to run so I can test it is tough--if I manage one change I'll do them all.