Add a link to Friture Privacy Policy

Users may want to know, and this is needed to publish to the application
stores, such as the Windows Store.

friture/about.py

@@ -31,6 +31,7 @@
 <p> Friture is an application for real-time audio analysis.</p>
 <p> License is GPLv3.</p>
 <p> Homepage: <a href="http://friture.org">http://friture.org</a></p>
+<p> <a href="http://friture.org/privacy.html">Privacy Policy</a></p>
 <p> Send comments, ideas and bug reports to: <a href="mailto:[email protected]">[email protected]</a></p>
 <p> Splash screen photo credit: <a href="http://www.flickr.com/photos/visual_dichotomy/3623619145/">visual.dichotomy</a> (CC BY 2.0)</p>
 <p>This instance of Friture runs thanks to the following external projects:</p>