Adding libvirt setup scenario

Do not merge yet - preview.

It looks like hammer is not yet ready for complete scenario.
> I think quotes are not necessary here, otherwise you get

Right, fixed the incorrect UNICODE-kind quotes.

> I think it should mention restarting libvirtd & modprobing kvm-intel too, nice work!

Fixed.

-- 
Later,
 Lukas #lzap Zapletal