■ 음성인식 및 TTS 관련 링크
http://cosmosjs.blog.me/220985183000 #네이버음성인식
https://console.cloud.google.com #구글 클라우드플랫폼
http://www.makewith.co/page/project/1088/story/2749 #구글음성인식
https://stackoverflow.com/questions/36347786/how-to-play-mp3 # mp3 재생방식
https://www.raspberrypi.org/forums/viewtopic.php?f=32&t=72277 #mpg123을 통한 재생방식
