Name: hook_forumrow
Rationale: This hook will allow for people to modify the topicrow before it is sent to the $template->assign_block_vars.
Placement: includes/functions.php function: display_forums()
Input arguments: &$forumrow (single parameter passed by reference)
Output format: void
Output semantics: $forumrow is passed by reference and acts as the Output.
Infrastructure: $forumrow is passed by reference within display_forums() that is the full array to be sent to $template->assign_block_vars.
