cleanup

Back when we moved the evolt.org data from the Cold Fusion CMS, we left a lot of loose ends hanging around. For example, not all of the search-engine friendly URL mapping was done, links to within an article are broken, images and assets are missing from articles. Everyone said that they would get around to doing something about it but, as usual, nothing ever got done. So I'm doing some of the clean up now just because it bugs the hell out of me.