Add some missing w3cids of editors.

Author: dbaron

compositing-2/Overview.bs

@@ -9,8 +9,8 @@ Shortname: compositing
 Level: 2
 Link Defaults: css-color-3 (property) color, svg (property) mask
 Deadline: 2014-08-17
-Editor: Rik Cabanier, Adobe Systems Inc., cabanier@adobe.com
-Editor: Chris Harrelson, Google Inc., chrishtr@chromium.org
+Editor: Rik Cabanier, Adobe Systems Inc., cabanier@adobe.com, w3cid 106988
+Editor: Chris Harrelson, Google Inc., chrishtr@chromium.org, w3cid 90243
 Former Editor: Nikos Andronikos, Canon Information Systems Research Australia, Nikos.Andronikos@cisra.canon.com.au
 Abstract: Compositing describes how shapes of different elements are combined into a single image. There are various possible approaches for compositing. Previous versions of SVG and CSS used <a href="https://www.w3.org/TR/SVG11/masking.html#SimpleAlphaBlending">Simple Alpha Compositing</a>. In this model, each element is rendered into its own buffer and is then merged with its <a>backdrop</a> using the Porter Duff ''source-over'' operator. This specification will define a new compositing model that expands upon the Simple Alpha Compositing model by offering:
 Abstract: <ul><li>additional Porter Duff compositing operators</li><li>advanced blending modes which allow control of how colors mix in the areas where shapes overlap</li><li>compositing groups</li></ul>