IRC chat fixed, minecart spawning disabled again

I have now fixed IRC, and all the messages should look like in-game. The only thing odd now is that a /me event in-game shows two messages on IRC. Will have to figure this one out.

Also, I came across an issue with minecarts. If you put a pressure plate next to a black wool spawner, it can happen that the cart is spawned, pushes you out of the way, on the pressure plate, spawns a minecart again, pushes you back on the pressure plate etc. Somehow the new limiter is triggered, but it seems still to cause an endless loop that freezes the server. I have now disabled automated spawning until we resolved that issue too.