Patch 1

This is a request to add 7 standard text frames to the spec:
  4.2.1 TIT4 Version
  4.2.3 THDB High-definition BPM (beats per minute)
  4.2.3 TSTM Set time
  4.2.3 TVNU Venue
  4.2.3 TVOX Vocal
  4.2.1 TAUT Audio Type
  4.2.3 TKY2 User defined key