add link for FLAC in WMP

doc/html/documentation.html

@@ -61,6 +61,7 @@
 			<li><a href="#plugins">plugins</a> - documentation for the various input plugins.</li>
 			<li><a href="api/index.html">libFLAC and libFLAC++ APIs</a> - for developers who want to add FLAC support to their programs.</li>
 			<li><a href="#bugs">bugs</a> - known bugs.</li>
+			<li><a href="http://losslessaudio.blogspot.com/2005/12/media-center-edition-2005-with-flac.html">How to add FLAC support to Windows Media Player</a></li>
 			<li><a href="#monkey">How to add FLAC support to the Monkey's Audio GUI</a></li>
 		</ul>
 		Keep in mind that the online version of this document will always apply to the latest release.  For older releases, check the documentation included with the release package.