Second Pull Request - Project Course (ThreadBoard)

        $thread = array();
        $thread_id = Param::get('thread_id');
        $thread = Comment::getByThreadId($thread_id);

        $total_comment = Comment::count($thread_id);
        $pagination = Pagination::setControls($total_comment); 

I used po `getByThreadId` method to get the comments po by `thread id` and to get the title naren po of the thread. That's why what I accessed po there is the `thread` table. 

I placed that po in the comment model because it will be used po in `getAll` method which is located in the comment model too. `getAll` method po is the one which will get the comments with pagination po :bow: 

        $comments = $thread->getAll($pagination['max'], $thread_id);