fix unbind: correctly remove array element
Merge pull request #20 from gido/fix-unbind

fix unbind: correctly remove array element (related to #19)
Now it's possible to write a class extending buzz.sound
Merge pull request #24 from victorjonsson/master

Now possible to write classes extending buzz.sound
Replace delete by splice for removing a sound from a group
Fix the Stop/play bug
Remove the group.setDuration. This method didn't exist.
Fix the bindOnce bug
Merge branch 'master' into prerelease
Release v1.0.6