make green.engine use logstate

darcs-hash:20090210132812-b2873-4bcb9ae8e60410937be0ed8b2709124ffc313523
Added auto_sound to to Engine.init_options_defaults for the sake of consistency

darcs-hash:20090210143743-58103-8a49c09733a47ac9199fe3d3f219aaf7a574539e