Harmonix Set v1.1

• Updated onsets with librosa 0.7.0
• Added youtube URLs
• Fixing some metadata associated with JAMS files.
• Added correct metadata to:
  • 0012_aroundtheworld
  • 0011_areyouexperienced
  • 0015_babygotback
  • 0028_blackmagic
  • 0078_donttouchme
  • 0079_dontyouwantme
  • 0161_limelight
  • 0194_nomoretears
  • 0218_policyoftruth
  • 0277_thashiznit
  • 0322_wordup
  • 0326_yougotittherightstuff
  • 0470_ours
  • 0562_alreadygone
  • 0653_dynamite
  • 0681_flashinglights
  • 0725_hotncold
  • 0843_omgalmighty
  • 0998_youregonnamissthis
• Added a requirements file.
• Added notebook to align YouTube audio to original one.