initial impl - ref #67 - still needs tests and docs
remove lang from webaudio deps
switch to on.once so listener is cleaned up
Merge branch '0.3.0' into sound
remove trailing comma
Merge branch '0.3.0' into sound

Conflicts:
	src/sounds/AudioBase.js
	src/sounds/HTML5Audio.js
	src/sounds/WebAudio.js
add _chooseFormat and _nextFormat to Sound
missing formats and probably/maybe arrays
do not try to determine extension if resource was requested with an extension already
Merge branch '0.3.0' into sound
Merge branch '0.3.0' into sound
specs for Sound and WebAudio, tweaks to all sound types
remove console.log
fix has test
Merge branch '0.3.0' into sound
dry it up a little
use on.once instead of on and switch src to currentSrc to skip selection process (hopefully)
spec for HTML5Audio
Merge pull request #90 from iceddev/sound

Finally think the auto-selection of sound extensions is ready - closes #67