html5_audio: extends HTML5Video instead of Playback and remove unnecessary methods (fixes #466)
html5_audio: extends HTML5Video instead of Playback and remove unnecessary methods (fixes #466)

dayvson/clappr,dayvson/clappr,flavioribeiro/clappr,clappr/clappr,clappr/clappr,flavioribeiro/clappr,dayvson/clappr,clappr/clappr,flavioribeiro/clappr