Examples: update Accelerometer programs syntax

[rwaldron]

No description provided.

[dtex]

Change events pass a single object {x, y, z} as a parameter. Could we illustrate that here with:

accelerometer.on("change", raw => {
    console.log(`  x            : ${raw.x}`);
    console.log(`  y            : ${raw.y}`);
    console.log(`  z            : ${raw.z}`);
    // And then switch to accessing properties on the instance
    console.log(`  pitch    : ${accelerometer.pitch}`);
    ... etc ...
});

?

[rwaldron]

The purpose of these baseline examples is to be able to see the consistent output across all instances, of all instance properties, regardless of controller/driver. If you want to make alternate versions of these, which looked like:

const {Accelerometer, Board} = require("../lib/johnny-five.js");
const board = new Board();

board.on("ready", () => {
  const accelerometer = new Accelerometer({
    controller: "ADXL335",
    pins: ["A0", "A1", "A2"]
  });

  accelerometer.on("change", data => {
    console.log("accelerometer");
    console.log("  x            : ", data.x);
    console.log("  y            : ", data.y);
    console.log("  z            : ", data.z);
    console.log("--------------------------------------");
  });
});

...And are named accelerometer-adxl335-change-event-data.js and co-exist with the examples we currently have, then by all means!