Remuda™ PERFORMANCE mode enhancements

Starting in version 2.0.0, Remuda™ PERFORMANCE mode supports separate Sets and Songs view. In songs view you see all of the songs that you have defined. In Sets view you see a list of those Songs that you have include in the Set. This change makes it possible to define a song and its presets, backing track, and PDF document (Android 5.0+) in one place so that you can easily include it in multiple Sets.