added hdf5 getters
modified ChordPerBeat recognition
added posiibility to apply log transform on spectum and PCP
added HDF5 functionality and ChordReader from cvs
added HDF5 functionality and ChordReader from cvs
changed parent chords for maj and min
added support to read transcriptions in SonicAnnotator format:
added MelodySegment class
added BeatStructureCVS
added ChordSegment from CVS
upgraded pom.xml