Introduce remainder of Ubuntu support

Note Ubuntu does not currently use or properly support systemd, so we
cannot obtain a nice systemd-analyze output. So for now we'll just emit
the "uptime" number, which is entirely incorrect but cannot be helped,
and is just a formatting placeholder until Ubuntu 14.10 stable supports
systemd.

Signed-off-by: Ikey Doherty <michael.i.doherty@intel.com>