[css-variables] Add Simon as co-editor.

Author: tabatkins

css-variables/Overview.html

@@ -20,7 +20,7 @@ <h2 class="no-num no-toc no-ref" id="subtitle">Editor's Draft,
         with subject line 
         &#8220;<kbd>[css-variables] <var>&#8230; message topic &#8230;</var></kbd>&#8221;
         (<a href="http://lists.w3.org/Archives/Public/www-style/" rel="discussion">archives</a>)</dd><dt>Editors:
-</dt><dd class="p-author h-card vcard"><a href="http://xanthir.com/contact" class="p-name fn u-url url">Tab Atkins Jr.</a> (<span class="p-org org">Google</span>)</dd></dl></div>
+</dt><dd class="p-author h-card vcard"><a href="http://xanthir.com/contact" class="p-name fn u-url url">Tab Atkins Jr.</a> (<span class="p-org org">Google</span>)</dd><dd class="p-author h-card vcard"><a href="https://exyr.org/about/" class="p-name fn u-url url">Simon Sapin</a> (<span class="p-org org">Mozilla</span>)</dd></dl></div>
   <div data-fill-with="warning"></div>
   <p data-fill-with="copyright" class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> &#169; 2013 <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>&#174;</sup> (<a href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>, <a href="http://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>, <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved. W3C <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>, <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.</p>
   <hr title="Separator for header">

css-variables/Overview.src.html

@@ -9,6 +9,7 @@ <h1>CSS Custom Properties for Cascading Variables Module Level 1</h1>
 Previous Version: http://www.w3.org/TR/2013/WD-css-variables-20130312/
 Previous Version: http://www.w3.org/TR/2012/WD-css-variables-20120410/
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact
+Editor: Simon Sapin, Mozilla, https://exyr.org/about/
 Abstract: This module introduces cascading variables as a new primitive value type that is accepted by all CSS properties, and custom properties for defining them.
 Ignored Properties: var-0, var-foo, var-main-color, color, var-Bar, var-two, margin-top, var-header-color, var-accent-background, var-foo-bar, var-bar, background-color, var-one, all
 Ignored Terms: <color>, <bad-url>, <bad-string>, <semicolon>, <delim>