Calibrate compass (#392)

* adding 'calibrate-compass' function

* fixing simulator.

* updated docs

* fixing compat test suite with 'calibrate()' function

docs/reference/music.md

@@ -10,8 +10,6 @@ music.beat(BeatFraction.Whole);
 music.tempo();
 music.changeTempoBy(20);
 music.setTempo(120);
-music.onEvent(MusicEvent.MelodyNotePlayed, () => {});
-music.setPlayTone((freq, ms) => {});
 ```
 
 ### See Also