Merge pull request #72 from bensadeghi/master

DecisionTree sha1 bump
Update the TextAnalysis package
Bump ArgParse (stderr_stream->STDERR)
Replace the Sound package with WAV.

The WAV package concentrates on WAV files.
Bump the WAV package version number.
Merge pull request #73 from dancasimiro/WAVPackage

Wav package
DecisionTree sha1 bump