[octave-control/f16] (4 commits) ...update to 2.2.0

[sailer]

Summary of changes:

  b972ee3... update to 2.1.55 (*)
  97c56f3... update to 2.2.0 (*)
  5ffae3b... Merge remote-tracking branch 'origin/master' into f16
  ddb8b6e... update to 2.2.0

(*) This commit already existed in another branch; no separate mail sent