Define a controller to handle new replies. This doesn't currently work, though.
Implement replying to a given post. When we quick-reply, we reply to the last post in the topic; if we hit on reply of a post, we will reply to that instead (for quick reply).
Implement reply for those who disable JavaScript.
Implemented the post edit and delete operations.
When deleting a post, nullify all child post's links.
When deleting a post, set all child posts to the parent of the post being deleted.
For now, when we click on reply, scroll to the reply box. When we fully implement this, the reply bow should appear below the post we are replying to.
Implemented creating new threads.