Setting up Behat and phpspec

Adding Behat and phpspec is easy, just edit your `composer.json` file and running `composer update`.

In order to install Behat, run `vendor/bin/behat --init`. This command will create the basic Behat scaffold and create a `FeatureContext` class for your.

I've deleted all the PHPUnit stuff, since I am not going to use it for this project.