[CSSWG][css-masking] Updated LCWD of CSS Masking 1

The CSS WG and the SVG Working Group have published an updated Last Call Working Draft of CSS Masking Module Level 1:

    http://www.w3.org/TR/css-masking-1/

CSS Masking provides two means for partially or fully hiding portions of visual elements: masking and clipping.

	• Renamed mask-box* properties and terms to mask-border*.
	• Added support for multiple mask layers. (Similar to multiple background layers for background.)
	• Added the mask-composite property to control compositing of multiple mask layer images with the keywords add, subtract, intersect and exclude.

Significant changes are listed at:

  http://www.w3.org/TR/2014/WD-css-masking-1-20140522/#changes

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

    [css-masking]

(as I did on this message).

For the CSS WG and the SVG WG,
Dirk Schulze