fix for failed download with no subtitles when requested
fix for failed download with no subtitles when requested

Cleanup, traverse the list of args backwards, match all possible languages, regex in global var
shelsonjava/node-youtube-dl,fent/node-youtube-dl,AirVuz/youtube-dl,przemyslawpluta/node-youtube-dl,mhlavacka/node-youtube-dl,deenjohn/node-youtube-dl,EragonJ/node-youtube-dl,joegesualdo/node-youtube-dl,cctuan/node-youtube-dl