some reorganization
featurize -> partial_transform()
Add docstrings
cleanup elsewhere
a couple more
Merge pull request #165 from rmcgibbo/featurize_to_partial_transform

featurize -> partial_transform()
fix docs
Merge pull request #166 from rmcgibbo/fix-docs

fix docs
Merge branch 'master' of github.com:rmcgibbo/mixtape into commands
move tests to appropriate place
pylint