MPRIS D-Bus integration

[GijsTimmers]

Some radio stations are pretty consistent in the way they transmit ICY info. It would be cool if artist/title information could be shown via native desktop notifications. As I see it, the most logical choice for this would be to pass ICY information to the MPRIS protocol.

Some radio stations put everything in the ICY information, so we need a smart, custom mechanism that figures out if information really needs to be shown.