Add Paweł Paprota to the list of authors in the documentation

about.html

@@ -29,6 +29,7 @@
 <li>Benjamin Johnson: Google Video InfoExtractor, Photobucket InfoExtractor, Yahoo! Video InfoExtractor, generic InfoExtractor, ideas, patches, etc.</li>
 <li>Vasyl' Vavrychuk: DepositFiles InfoExtractor, ideas and patches.</li>
 <li>Witold Baryluk: Dailymotion InfoExtractor.</li>
+<li>Paweł Paprota: YouTube user videos InfoExtractor.</li>
 <li>Many other people contributing patches, code, ideas and kind messages. Too many to be listed here. You know who you are. Thank you very much.</li>
 </ul>