Enhancement: Open test page from the command line

We've introduced a little Node.js script that automates the task of
opening a (default) web browser and loading the test page of our
application.

What we learned:

* How to require and use Node modules
* Spawn child processes with Node
Enhancement: Serve application and tests through HTTP

We added a simple Node.js-based HTTP server to expose the application
and its tests more easily. This is the first step towards having our
tests being run on the CLI.

What we learned:

* How to install Node modules through NPM
* How to write a simple web server in Node
* Events (emitter)
* Callbacks which are everywhere in Node.js