Bug fix release
- Player: Changed the seek-to-almost-the-end button to start four seconds before the fade instead of three seconds.
- Player: Fixed the behaviour of the song position slider when the song start was set.
- Music Editor: The 'mark' button will now add in any pre-existing song start when setting the song start.
- Player: The code changes for interfacing with the music editor stop-and-play was not cleaning up files properly.
- Fixed various process intercommunication problems (music editor, music manager, player).
- Bug: Player window was changing position on exit.
- Bug: Player: temporary music files were not always being cleaned up on exit.