In order to demo your feature specs, follow these steps:
- Add capybara, poltergeist, launchy and selenium-webdriver to your Gemfile under test and development group.
 - Add the attached demo helper to your spec/support.
 - Add the capybara config to your spec_helper file.
 - Run bundle install.
 - Write your feature with its scenario specs.
 - Put a demo filter on each scenario you want to demo. ( refer to the example below )
 - Run bundle exec rspec spec.