[Merge] ~dbungert/livecd-rootfs:ubuntu-mini-iso into livecd-rootfs:ubuntu/master

[Michael Hudson-Doyle]

Oh more funtimes: the .disk/info contains a serial, which I don't think is passed in any way to the livefs build currently, ubuntu-cdimage keeps it to itself. I guess we can fix that.
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https://code.launchpad.net/~dbungert/livecd-rootfs/+git/livecd-rootfs/+merge/436420
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