Minecarts re-enabled, but not for mobs!

It seems the minecart system is causing crashes when mobs using it. So we now disabled the functionality when mobs are riding it. This means that a mob entering a minecart will not be able to use any of the woolblock functions.

Sorry about this, but it seems to be a major complicator to safely enable mobs for now. We will let you know if there is any change to that.