[css3-flexbox] Add pseudo-stacking context issue to DoC

Author: fantasai

css3-flexbox/issues-cr-2012.html

@@ -178,3 +178,12 @@ <h1>CSS Flexible Box Layout Level 3 Disposition of Comments for 2012-09-18 CR</h
 Response: <a href="http://lists.w3.org/Archives/Public/www-style/2013Mar/0257.html">http://lists.w3.org/Archives/Public/www-style/2013Mar/0257.html</a>
 Closed:   Accepted
 </pre>
+<pre class="open" id="issue-18">
+Issue 18.
+Summary:  Paint flex items and table cells atomically
+From:     fantasai
+Comment:  <a href="http://lists.w3.org/Archives/Public/www-style/2013Mar/0707.html">http://lists.w3.org/Archives/Public/www-style/2013Mar/0707.html</a>
+Note:     Requires CSS2.1 change.
+Note:     Probably should go to LC as an open issue for feedback.
+Open
+</pre>

css3-flexbox/issues-cr-2012.txt

@@ -128,3 +128,12 @@ From:     Tab Atkins Jr.
 Comment:  http://lists.w3.org/Archives/Public/www-style/2013Feb/0364.html
 Response: http://lists.w3.org/Archives/Public/www-style/2013Mar/0257.html
 Closed:   Accepted
+----
+Issue 18.
+Summary:  Paint flex items and table cells atomically
+From:     fantasai
+Comment:  http://lists.w3.org/Archives/Public/www-style/2013Mar/0707.html
+Note:     Requires CSS2.1 change.
+Note:     Probably should go to LC as an open issue for feedback.
+Open
+----