fixed topic links

I seem to remember somebody pointing out that the links when viewing a forum aren't correct. So I fixed them to replicate what phpBB and vbulletin and the other popular websites do.

- clicking the little white paper takes you to the newest post you haven't read
- clicking the topic title takes you to the first page
- clicking the person's name under "last post" takes you to the last poster's profile
- clicking the paper with the arrow under "last post" takes you to the last post in the topic

I'm also locking topics in this forum that have been resolved, so that I can easily see what issues are still remaining