rank.rb now takes input file on command line

rank.rb

@@ -93,7 +93,7 @@ puts '<h1>Hand Log</h1>'
 puts "<table>"
 puts "<tr><th>Player</th><th colspan=2>Hands</th><th>Score</th><th>Total</th></tr>"
 even = false
-IO.readlines('hands.txt').each do |line|
+IO.readlines(ARGV[0]).each do |line|
 	player,cards = line.chomp.split(/,/)
 	score,hands = score(cards)
 	total[player.downcase] += score