[libvirt] Usability Enhancement: Import/Export VMs GUI

[bancfc at openmailbox.org]

The single most important usability feature missed by our less technical 
users who migrate  from VirtualBox is a one click import/export of VMs 
and their config settings.

I was optimistic about the Gnome Boxes effort on Govf lib but 
unfortunately it was never realized and I would hesitate to recommend it 
because libvirt/virt-manager has the security advantages of sVirt.

An ideal solution would work across all KVM frontends.