Prepare distribution
Update README
Fix bug where comparison didn't work w/o cmdline args
Bump into 0.0.2
Require test before release
Replace audiotools with pydub

audiotools is difficult to install. pydub requires ffmpeg binary
but it can be easily installed on OS X using Homebrew.
Bump into 0.0.3
Remove pydub
Bump into 0.0.4