Reduce the rate of bots' learning from conversation in the current room.
Reduce the rate of bots' learning from conversation in the current room.

In light of the previous commit, a message would have been added to the same Markov chain seed once for each Markov bot in the room. This isn't a perfect solution, but it's random (and may have interesting results).

nashkevin/Turing-Party,nashkevin/Turing-Party