Add "now playing" support

[Dannyzen]

Would be nifty to be able to see what song is playing from the stream... http://anton.logvinenko.name/en/blog/how-to-get-title-from-audio-stream-with-python.html might be of help to get started...

[coderholic]

We're not streaming the audio ourselves, we just call mplayer or vlc, and show the player output in the status bar of pyradio. At least with mplayer the current song is usually displayed in the status bar, depending on the specific station.