Break scripts up into packages for thos related to block devices, network devices and common.
Break xen udev rules out into it's own package.
Add kernel config fragment for a VM acting as a Xen NDVM.
Add NDVM kernel config to 3.8 kernel bbappend with distro feature.
Add NDVM image.
xen recipe: remove xen pci passthrough config patch that isn't required.
xen recipe: fix xen-udev package by removing udev rules from base.
kernel: sync kernel configs between 3.4 and 3.8.