I'm afraid the google code versions is very much out of date. The current version is 0.31, which can be found in this thread
here.
While we really ought to be using version control software, in a clever shared manner, at present we seem to be posting updates here, which I copy back to the fifth post in this thread.
Some ncx generation code would be welcome. I posted a sample of the binary data representing an ncx, along with the source ncx file,
here.
Any other changes would be interesting to see too.