[css-flexbox] Update computed value of align-self to match resolutions on css-align. Fixes w3c#644.

Author: fantasai

css-flexbox/Overview.bs

@@ -1968,7 +1968,7 @@ Cross-axis Alignment: the 'align-items' and 'align-self' properties</h3>
 	Initial: auto
 	Applies to: <a>flex items</a>
 	Inherited: no
-	Computed value: <a value for=align-self>auto</a> computes to parent's 'align-items' value; otherwise as specified
+	Computed value: as specified
 	Media: visual
 	</pre>
 
@@ -3373,13 +3373,22 @@ Boris Zbarsky.
 
 	This section documents the changes since previous publications.
 
-<h3 id="changes-20160301">
+<h3 id="changes-20160526">
 Changes since the 26 May 2016 CR</h3>
 
-http://www.w3.org/TR/2016/CR-css-flexbox-1-20160526/
-
 	A <a href="https://drafts.csswg.org/css-flexbox-1/issues-cr-20160526">Disposition of Comments</a> is also available.
 
+<h4 id="change-201605-substantive">
+Substantive Changes and Bugfixes</h4>
+
+	<ul>
+		<li id="change-2016-align-self-as-specified">
+			For ease of implementation, ''align-self/auto'' value of 'align-self' now computes to itself always.
+			See <a href="change-2015-align-self-auto">related previous change</a>
+			requiring this computation for absolutely-positioned elements.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/440">Issue 440</a>)
+	</ul>
+
 <h4 id="change-201603-substantive">
 Substantive Changes and Bugfixes</h4>