v1.3.1

Fixes

• OLED pixel shift no longer exposes a mismatched color at the screen edge when it nudges the
  page
• Reduced Bluetooth disconnect/reconnect blips: an automatic restart after a go-librespot crash
  no longer tears down and recreates the Android-side audio output, which was a known trigger for
  the connected Bluetooth device to briefly drop and re-establish its audio route.
  (not fully fixed, if you run the app for hours like me you will notice it)

New

• Automatic cache clearing (optional, off by default) — wipes the cached track audio once it
  grows past a size limit you set (50MB–2GB, 500MB by default), checked on every start.
  (you can do that in the android setting, but i still added a option for doing it automatically)