added Troll module

Added the Troll module I found for Drupal (http://drupal.org/project/troll) and re-enabled comments.

Of course, the fun part starts now - Did I set it up correctly? Are real people getting banned? Etc. Etc.

I hate spammers.

UPDATE: Five minutes after I enabled comments, I get 5 spam comments in the antispam queue.

Gods I hate spammers.