[games_access] New closed captioning stats

[Reid Kimball]

Marc Laidlaw of Valve pointed me to this link:
http://steampowered.com/status/ep1/?captionsHelp

12.33% use subtitles and closed captions. At this point, they don't
measure the two separately.

They define this as "The percentage of players who had captions
enabled on at least one map, among players with at least one game
session recorded."

In case you aren't sure, subtitles are only dialog, closed captions
include dialog and sound effects.

-Reid