[css-conditional-3] Add two co-editors per CSSWG resolution

Author: svgeesus

css-conditional-3/Overview.bs

@@ -10,6 +10,8 @@ TR: https://www.w3.org/TR/css3-conditional/
 Previous Version: https://www.w3.org/TR/2013/CR-css3-conditional-20130404/
 Test Suite: http://test.csswg.org/suites/css-conditional-3_dev/nightly-unstable/
 Editor: L. David Baron, Mozilla https://www.mozilla.org/, https://dbaron.org/, w3cid 15393
+Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.net/contact, w3cid 35400
+Editor: Chris Lilley, W3C, chris@w3.org, w3cid 1438
 Abstract: This module contains the features of CSS for conditional processing of parts of
   style sheets, conditioned on capabilities of the processor or the
   document the style sheet is being applied to.  It includes and extends the