Captain games bug fix, Implemented anti-spam

Min games to captain was being compared to the wrong number, fixed the
bug

Implemented an anti-flooding thing that keeps track of users spamming
messages. If a user spams same command too many times, it will warn the
user (and also ignores everything besides the first command).

This will help with the issue of the messengers crashing due to
overflooding. However, if a zillion users spam the bot, this will not
help.

The spam flood check is reset every 6 seconds.