title: Count of number of test scenarios in my acceptance test suite
body: <p>I have added something into my
      env.rb
  which calculates a value after each scenario completion.</p>
  
  <p>Say initially </p>
  
  <pre><code>i = 0
  (after Scenario 1)
  i = 0.330
  (after Scenario 2)
  i = 0.330 + 0.3456 = 0.6756
  (so on, till end of whole test) 
  </code></pre>
  
  <p>Now I want to take the average of the value i with the number of test scenarios in my acceptance suite. 
  To make long story short, Is there a method to dynamically return the number of test case scenarios in the whole test suite? </p>