Quick Fix: Added slashes to full names

I added slashes to the areas where I used full names rather than relative URLs. There are two places I used full names: One to link back to my domain's main page (for mirroring purposes) and one to link to the phpBB forums I use. The forums don't work very well when someone's mirrored the site, so it's best to use a full URL for those.

The slashes were made necessary because of the implicit meaning they convey. When you put a slash at the end of a directory name, it apparently says "I want the index at this location." While having no slash means "I want the index for this site." Subtle, but important difference.