Fix for "fleave" command. Updated documentation.

Updated "fleave" command to reflect changes with "leave" command.
Updated "rank" and "top" commands.

"top" command now only outputs up to 10 players at a time. Both "rank" and
"top" commands take advantage of PlayerRecord comparators where possible.
"winrate" is now available as a stat for "top" and "rank" commands for
TexasTourney. Changed equals() to equalsIgnoreCase() for string
comparisons in those two commands (issue #137).
Replaced loadPlayerStat() with loadPlayerRecord().

Minor rewrite in the way data is read from players.txt in CardGame.
Fix for issue #142.

Switched order in which messages for blind doubling are sent so that
outputted numbers are correct.
Merge branch 'testing'