title: Code Lens option not available
body: <p>Why would the new <code>Code Lens</code> option not be available in Visual Studio 2013 Professional? How can I add it (back?) into VS2013?</p>
  
  <p>Example on how it should look:
  <img src="https://i.stack.imgur.com/irWY6.png" alt="enter image description here"></p>
  
  <p>Example on how my Options looks:
  <img src="https://i.stack.imgur.com/41ThX.png" alt="enter image description here"></p>