Code Documentation

Why is there no documentation with the code or on the website?

I've been looking at the Tee Worlds source code to see if I could modify it but without some reference information it's very difficult to see what's going on, much less do anything useful with it.
I used Doxygen to generate an HTML reference showing classes, functions, etc and that seems to work well, I think this might be a helpful thing to have available, especially if it had descriptions from someone who knows what the code does!

If it was easier you might get more people to help (although this is not always a good thing!).