* Move boot profiler execution from runlevel S to initramfs to also gather
   files used during those many `live-bottom` scripts.
 * Make the boot profiler provide a ready to use sort list, now in
   /var/log/boot-profile.
 * Implement readahead. That needs real world tests before deciding if it's
   actually an improvment.
 * Backport bootchart from Ubuntu to get accurate measurements. Binary packages
   needs to be manually copied to be used.
 * Update sort list.
 * Update documentation.