0.2 beta.3

This is a new build containing a revamped Preferences menu, numerous bug fixes, more actions for the right-click menu of the track queue, more Last.fm options, and probably a couple other things.

edit: Added media key support and maybe fixed a couple bugs. Also, added debug symbols for the build to help with crash debugging.

edit 8/16: Fixed a stupid Last.fm-related crash, a bug that had crippled playlists, improved seek visuals and end-of-track handling and revamped the source list appearance a bit.