[Playlist] another web-based generator

[Lucas Gonze]

http://www.pixpix.net/ can be used to author XSPF.  The playlist URLs
are freely loadable by third parties, e.g. by third party players offsite.

A sample playlist is at http://www.pixpix.net/xspf/popular.xspf

The validator at xspf.binera.de found a smallish error in that XML,
though.  The <br> in this element isn't valid XML:

<location>http://www.planetyahyah.com/dash/sounds/mp3/David%20Bowie%20&%20Queen%20-%20Un<br>der%20Pressure.mp3</location>