[CSSWG][css-counter-styles] Updated WD of CSS Counter Styles

The CSS WG has published an updated Working Draft of the CSS Counter
Style Module Level 3:

    http://www.w3.org/TR/css-counter-styles-3/

This spec documents the existing CSS 2.1 and 2.0 counter styles in
better detail, adds a handful of CJK and other list styles, and adds a
@counter-style rule which allows authors to define their own counter
styles.

Since the last WD, I've added the 'width' and 'speak-as' descriptors
to the @counter-style rule, and added the 'disclosure-*' styles,
intended to be used for <details> and similar elements.  Please review
these additions and send comments.

Significant changes are listed at:

  http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130221/#changes

Please send any comments to <www-style@w3.org>, and please, prefix the
subject line with

    [css-counter-styles]

(as I did on this message).

For the CSS WG,
Tab Atkins Jr.