Removed X11 dependencies

Greetings,

Not sure if you're still interested in working on this, but I was nonetheless impressed by the set up enough, and the lack of a current host for it, that I've gone ahead and patched some things to remove the X dependencies, as well as switch to a more official port for HTTP.

I'm hosting this fork publicly now at http://try-racket.org/

I'm a little curious about the licensing situation here, however, and whether you had interest in continuing to maintain it.