Clarify matchmedia not in default 3.0 package

Author: albell

index.html

@@ -46,7 +46,7 @@ <h3 class="hed-subsection" id="contributing">Contributing, Bug Reports, and More
 			<h2 class="hed-section" id="download">Downloading Picturefill</h2>
 
 			<h3 class="hed-subsection">Picturefill Version 3.0.0 (Alpha)</h3>
-			<p>Version 3 is a full rewrite of the codebase featuring optimized performance, better emulation of native behavior, and new spec-based parsers. It also handles some of the quirks, shortcomings, and edge cases related to first-generation native implementations. As with version 2, the default download packages include the <a href="https://github.com/paulirish/matchMedia.js/">matchMedia polyfill</a> for browsers that need it (like IE9). Feedback on this alpha release is welcome. If you encounter issues, please <a href="https://github.com/scottjehl/picturefill/issues">file a issue</a> on Github.</p>
+			<p>Version 3 is a full rewrite of the codebase featuring optimized performance, better emulation of native behavior, and new spec-based parsers. It also handles some of the quirks, shortcomings, and edge cases related to first-generation native implementations. For IE 9 and earlier, version 3 includes a small shim that polyfills the use of common media conditions (<code>min-width</code>, <code>max-width</code>, <code>min-height</code>, <code>max-height</code>). If you need old IE support for other media conditions, such as <code>orientation</code> or <code>aspect-ratio</code>, please additionally include the <a href="https://github.com/paulirish/matchMedia.js/">matchMedia polyfill</a>. Feedback on this alpha release is welcome. If you encounter problems, please <a href="https://github.com/scottjehl/picturefill/issues">file a issue</a> on Github.</p>
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 					<a href="#" class="download">picturefill.js</a>