parse tudou url like http://www.tudou.com/albumplay/TenTw_JgiPM/PzsAs5us...

I have fixed a problem that youtube-dl can't parse tudou urls like this:"http://www.tudou.com/albumplay/TenTw_JgiPM/PzsAs5usU9A.html".
Corresponding methods are added into the tudou.py extractor class.