update green.engine and chat scripts to use the new Engine with notifications

darcs-hash:20090210081124-b2873-d0b6d3510aa6e6a068d29053ad5ae8a91d230c1e
fix for pypjua.green.engine

darcs-hash:20090210085404-b2873-0c76a7f0315a8903bc39150fa1647feb6c5fec39