[css3-layout] Updated Changes section.

Author: bert-github

css-template/Overview.src.html

@@ -4557,6 +4557,14 @@ <h2 id=changes>Changes</h2>
 href="/TR/2011/WD-css3-layout-20111129/" >29 November 2011 draft:</a>
 
 <ul>
+<li>Following the model of [[CSS3-FLEXBOX]], there is now a new value
+''grid'' for 'display' that turns a grid element and its children into
+block boxes. Such children are positioned with 'grid-area' and 'flow'
+does not apply.
+
+<li>A new ''grid'' value on 'position' switches elements between
+positioned ('grid-area' applies) and flowed ('flow' applies).
+
 <li>Short rows in a template aren't automatically padded with '.', but
 make the template illegal. <!-- WG decision 11 Apr 2012 -->