What does guijs do?

Hi guys,

I saw a link/recommendation to guijs on Twitter and thought I'd take a closer look. But, there is absolutely no documentation. What exactly does guijs do for me? How do I use it?

I downloaded the Windows install, ran it and started it. On the welcome screen there is "Import a project". What is a project? And what are the effects of doing the import? Does it affect my existing "project"? What is created?

Just being constructive here... :-)

-Tor