Add Faker.js (fake data for tests) module (fixes #41)

[mmafe]

Fixes #41

Installs Faker.js module. Provides fake data (e.g. firstname, lastname, email, lorem ipsum, etc.) for tests.

Once installed on an environment, remember to run npm install and npm install --only=dev in the project directory to include the library.

To use in code:

1. Include const Faker = require('faker'); at the top of your test file
2. In your test, you can generate random data using format Faker.<lib name>.<method()>; so for example:

var firstName = Faker.name.firstName();
var lastName = Faker.name.lastName();
var summary = Faker.lorem.paragraph();
var teaser = Faker.lorem.sentence();

[mmafe]

Merged onto next branch for demo. After demo, will create pull request to the master branch for testing.