vagrant-libvirt support

This commits adds basic support to use the Vagrantfile with vagrant-libvirt 
plugin.
On Mon, Dec 1, 2014 at 6:43 AM, Ivan Necas <notifications@github.com> wrote:

> @mfojtik <https://github.com/mfojtik> were is the tooling/mainainer for
> the virtualbox variant. It migth make sense to manage those two in similar
> manner.



FYI: they're drastically different unfortunately... vbox makes your life
suck :(