On abnormal reboot, add files in /proc/lastlog/* into crash report
Add kernel parameters into crash report
Detect HW reboot just by pwr_on_by_HW_ status prefix

This recognizes pwr_on_by_HW_reboot and pwr_on_by_HW_SMPL statuses we
have now and also any status that might be added later.
Check that /proc/lastlog exists in _dump_proc_lastlog()
Merge pull request #35 from xhaakon/master

On abnormal reboot, add files in /proc/lastlog/* into crash report