On my system, Chrome is not in the location that the
`Selenium::WebDriver` expects it to be by default. This configuration
setting lets a developer set the path to the Chrome binary explicitly if
necessary.
Any Capybara-related test setup has been moved to `capybara_helper.rb`.
Now we just must require this file in order to run tests with Capybara.
I also moved the `#console_log` helper to this file to showcase how
other global helper methods could be defined in this file.
benjamin wil