title: Difference between click_on and click_link?
body: <p>I am writing request specs and I am using poltergeist-1.0.2 and capybara-1.1.2. I have the following code:</p>
  
  <pre>
      login_as @user, 'Test1234!'
      click_on 'Virtual Terminal'
  </pre>
  
  <p>the login has flash message that shows to the user that he is successfully logged in. When I am using click_link, the spec fails because Capybara can't find element 'Virtual Terminal' but when I am using click_on everything passes. 'Virtual Terminal' is not a button, it is a link.</p>
  
  <p>What is the difference between click_on and click_link.</p>