Don't know if this helps, But I found out that you must power on the board before issuing "detect"., And additionaly, you must supply a "bsdl path <bsdlfiledefinitions>" or generate/convert urjtag definitions of the chip .</bsdlfiledefinitions>
I was thinking in using it as a starting point for a development of my own. And would take up the GTK+3.0 upgrade .,. **
Is there any plan to continue this project?