Are you still working on this?
Moin Moin,
 I just wanted to know if this library is still being maintained I wanted to use it to write a GUI for a small application for a shop that my friend owns, so I'd like to know if you plan to work on this any further. Also would like to work on this myself, so maybe you write a little text how to add new stuff to nigui

Greetings from Schleswig Holstein
Thomas Dost