Change in BARSoxTrack and creation of BARSoxPatternSoundSystem. Both are incomplete and undocumented.
Merge branch 'master' of https://github.com/hduprat/project-bar
The BARSoxPatternSoundSystem class previews the tracks.
The BARSoxPatternSoundSystem class plays all the tracks (not documented yet, some problems)
Merge branch 'master' of https://github.com/hduprat/project-bar