[css-font-loading] Prepare for WD.

Author: tabatkins

css-font-loading/Overview.bs

@@ -4,7 +4,7 @@
 Shortname: css-font-loading
 Level: 3
 Group: csswg
-Status: ED
+Status: WD
 ED: http://dev.w3.org/csswg/css-font-loading/
 TR: http://w3.org/TR/css-font-loading/
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/