I have *very* limited time to answer questions and offer support.
My full time employment with Tableau Software does not leave me much time to work on Zero. When I do, I focus mostly on re-writing the GUI in a lighter way approach using Fltk.
I lost interest in Ubuntu since they chose Gnome 3 (the most retarded GUI ever) as their default desktop, and have not upgraded in ages (I am still on 11.04) so please don't bother to ask about build issues on 12.x.
Please feel free to fork the project and use the code as you please, it is free as in beer but don't expect me to answer question very quickly (unless you are interested in a commercial collaboration in which case I may be more flexible.)