[mediaqueries] Add to intro.

Author: tabatkins

mediaqueries/Overview.html

@@ -180,7 +180,8 @@ <h2 class="heading settled heading" data-level=1 id=intro><span class=secno>1 </
   &lt;link rel="stylesheet" type="text/css" media="print" href="print.css"&gt;
 </pre>	</div>
 
-<p>	CSS adapted and extended this functionality with its <a class=css data-link-type=maybe href=http://dev.w3.org/csswg/css-conditional-3/#at-ruledef-media title=@media>@media</a> and <a class=css data-link-type=maybe href=http://dev.w3.org/csswg/css-cascade-3/#at-ruledef-import title=@import>@import</a> rules.
+<p>	CSS adapted and extended this functionality with its <a class=css data-link-type=maybe href=http://dev.w3.org/csswg/css-conditional-3/#at-ruledef-media title=@media>@media</a> and <a class=css data-link-type=maybe href=http://dev.w3.org/csswg/css-cascade-3/#at-ruledef-import title=@import>@import</a> rules,
+	adding the ability to query the value of individual features:
 
 	<div class=example>
 		Inside a CSS style sheet,

mediaqueries/Overview.src.html

@@ -34,7 +34,8 @@ <h2 id="intro">
 		</pre>
 	</div>
 
-	CSS adapted and extended this functionality with its ''@media'' and ''@import'' rules.
+	CSS adapted and extended this functionality with its ''@media'' and ''@import'' rules,
+	adding the ability to query the value of individual features:
 
 	<div class="example">
 		Inside a CSS style sheet,