hls: destroy hlsjs instance properly on stop (fixes #662)
hls: destroy hlsjs instance properly on stop (fixes #662)

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