A couple of gotchas that I ran into along the way:
First, you may need to add the following line to your features/support/env.rb file:
require 'capybara-webkit'O'Riordan doesn't do this in his project, but I got an error:
"no driver called :webkit was found, available drivers: :rack_test, :selenium (Capybara::DriverNotFoundError)"and found this discussion which gave me the solution.
Second, although it may be obvious, I missed the fact that you MUST put