Clarify require in examples

[shadowspawn]

Pull Request

Problem

The require used for running examples directly in a git clone is different than in a normal program.

var program = require('../');

Solution

Add a commented out normal require and explanation:

// const program = require('commander'); // (normal include)
const program = require('../'); // include commander in git clone of commander repo

(Also switched from var to const in the older examples.)

[abetomo]

👍