(partially) fixing the RSS feed

The RSS feed does not show up very well in my reader so I decided to selfishly fix it so it works better :)

This update includes a couple fixes, but there are more to do do to achieve perfection, as indicated by the [feed validator](http://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fwww.usv.com%2Ffeed%2Fnew).