[CSSWG][css4-images] FPWD of CSS4 Images

The CSS WG has published a First Public Working Draft of the
CSS Image Values and Replaced Content Module Level 4

     http://www.w3.org/TR/css4-foo/

This module covers URL-referencing and gradient notations,
and various properties for controlling replaced element sizing
and image processing in CSS.

Additions from Level 3 include
   * bidi-sensitive images
   * element() for reusing the image of an element
   * image-set() for negotiating multiple image sizes
   * conic-gradient()
   * cross-fade()
   * 'image-rendering'
   * Interpolation of images
   * Serialization of image notations

**This is an early-stage Working Draft, and there are many open
issues on these features.** Your feedback is welcome in improving
the draft.

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

   [css4-images]

(as I did on this message).

For the CSS WG,
~fantasai