Add "Confirmed Kills" & "Kill Rating" (number) to status screen

[Kroc]

Elite doesn't actually tell you the specific number of kills you have, just your rank ("Harmless", "Mostly Harmless", etc.). The BBC version counted all kills as 1, but later ports used fractional numbers, giving less for 'unworthy' kills, therefore we cannot display just that number as-is.

A "Confirmed Kills" number will display only the number of piloted-ship kills, not your fractional count. A "Kill Rating" value will show you the actual 'kill count' as the code sees it, a fractional number upon which the players Ranking is measured.