Merge pull request #5 from robertstarmer/folsom

Add reference to qemu.conf file
Fix rootwrap behavior in folsom.2

Folsom.2 changes rootwrap behavior, this adds
the new rootwrap.conf file, and adds the nova.conf
parameter needed to configure it.
It doesn't remove the rootwrap_helper parameter that
will go away in Folsom.3

Tracked with bug https://bugs.launchpad.net/openstack-cisco/+bug/1130549