title: 'Feature' and 'Scenario' aliases from Capybara throw an 'undefined method' error when used with RSpec
body: <p>It looks like those aliases are not loaded properly. I'm using Rails 3.X, rspec 2.8 and capybara 1.1.2 to write some integration tests. 
  I think that my installation of Capybara is successful as it all works with the standard 'describe' and 'it' tags, but 'feature' and 'scenario' aliases from Capybara throw an 'undefined method' error.</p>
  
  <p>I don't see anything in the documentation mentioning more configuration:
  <a href="https://github.com/jnicklas/capybara" rel="noreferrer">https://github.com/jnicklas/capybara</a>
  I have simply added the 'require capybara/rspec' in my spec_helper.rb</p>