$ npm install npm-demo-testing-maz --save
var demo = require('npm-demo-testing-maz');
demo.printMsg();
$ node index.js
$ npm init
exports.printMsg = function() {
console.log("This is a message from the demo package");
}
$ git add.
$ git commit -m "Initial release"
$ git tag v0.0.1
$ git push origin master --tags
$ npm add user
$ npm login
$ npm publish