Update readme for "playbackRate" method
Update readme for "playbackRate" method

nirvanatikku/jQuery-TubePlayer-Plugin,CarlRaymond/jQuery-TubePlayer-Plugin,html2k/jQuery-TubePlayer-Plugin,html2k/jQuery-TubePlayer-Plugin,CarlRaymond/jQuery-TubePlayer-Plugin,CarlRaymond/jQuery-TubePlayer-Plugin,html2k/jQuery-TubePlayer-Plugin,nirvanatikku/jQuery-TubePlayer-Plugin,nirvanatikku/jQuery-TubePlayer-Plugin