update README.md
add volume control to Channel.play()
v0.2.0
allow audio to be played from an audio completion callback (closes #7)
update changelog
Removed `data` argument from `Channel.play` and `Timer.new`
add travis-ci support
v0.3.0
update travis.yml
update travis.yml
Free Ogg memory after playing an audio file.
v0.3.1