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==                           T O D O                               ==
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== Features
    => Print Music (or translate to printable format)
    => Improve Play Music (or translate to playable format)
    => Improve translation of music
    => Improve counting of music elements
    => Improve Abstract Music definition
    => Improve MusicXML Stratification definition
    => Make MusicGrep tool
    => Make Music Scripting language and tools

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== Small features
    => Implements combinators to all layers (it doesn't use class):
            Music.Analysis.Melodic, Music.Analysis.Rhythm, 
            Music.Analysis.Zip, Music.Analysis.Notations, 
            Music.Analysis.VoicesAndInstruments and 
            Music.Analysis.Annotation
    => Re-write relative function using PF at
            Music.Analysis.Melodic
    => Re-write measure division using PF at
            Music.Analysis.Interface
    => Implements a generic Interface using class Interface at 
            Music.Analysis.Interface
    => Update recently changes at Annotation
    => Implements PitchReduction at
            Music.Analysis.Melodic
    => Implements RhythmReduction at
            Music.Analysis.Rhythm
    => Reimplements Rhythm combinators  ???
    => Clean deprecated code forall modules

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