* Fixed topic reference.
* Common Topic CRUD actions are now more or less complete.
** The partial 'topics/_form.html.erb' now uses 'author_id' instead of 'author'.
** The partial 'forums/_in_topic_control_box.html.erb' not references the correct topic path.
* Fixed 'User.can_moderate_forum?(forum)' method.
* Added 'CommentsController'.
* Added routing for 'CommentsController' and reorganized routes file.
* The 'user_thumb' partial is now renderd correctly through the user listing.