audio/din: Update to 65

Changes since 64.2:

DIN Is Noise 65:

• fixed crash of DIN64.2 if the whole beat pattern is cut into memory! /* flip
  
  flips beat pattern between start/end vertex about vertical axis */ /* Beater editor now accesible via Menu on all instruments */
• improved Polyrhythm plugin
• improved write-svg command that writes curve seen in any curve editor into an svg file to learn how to use, from command mode, type help write-svg
• improved documentation at https://dinisnoise.org/docs/