[Banshee-List] Big changes to libbanshee

["Aaron Bockover" <abockover novell com>]

I've spent today doing a lot of overdue organization of the libbanshee
player engine/gstreamer code. The engine was growing ugly and code was
becoming hard to read, it was not organized into proper modules, etc.

So the organized code is now much easier to read and maintain, but I
_may_ have inadvertently broken something. I doubt it, because I did not
change functionality, just moved things around, but you never know.
Famous last words.

So, please test playback! If you notice something is not quite right,
let me know.

--Aaron