Resource page update

I just updated the resource page with a few more links.

I'm still working my way through the obvious stuff, like Games Diner, Gaming Ballistic, Dungeon Fantastic, Gnome Stew, etc. I also added a couple of links to Forgotten Realms related material, as I'm running a campaign in this setting and I found it a good opportunity to share these.

Also, I reorganised the page a bit so it doesn't just look like a bag of links.