Added missing /media directories
Added symlink for /root to /home/root until nothing references /root anymore.
An example are SELinux contexts.  Also set the uivm image to remove unneeded
initscripts.
Did not have do_install set to apply to all machine types.  It was only applying
to openxt-dom0.
Removed the setting of the rootfs to read only.  It would be more proper
to find out why run-postinsts does not finish everthing at rootfs creation
time.
Changed installation of .ssh to be in /home/root instead of /root.  Not
sure why this is a separate recipes and not part of xenclient-dom0-image.