Upgrading to 5.0

Simple fixes to make this compatible with 5.0, done for a site I'm working on at http://www.andy-lowe.com/uberdev :

1) Change module_exist in node-forum.tpl.php to module_exists.
2) Include the attached .info file in the modules directory w/ flatforum.module.

Thanks for this bit 'o code! :)