title: webapi.helppage package added but apiexplorer is not finding anything
body: <p>I have a <code>.NET 4.5 MVC 4</code> project which I have added the <code>webapi.helppage</code> package to it via NuGet. </p>
  
  <p>Then added an <code>ApiController</code> to my project of the below:</p>
  
  <pre><code>public class ValuesController : ApiController
  {
      // GET api/values
      public IEnumerable&lt;string&gt; Get()
      {
          return new string[] { "value1", "value2" };
      }
  
      // GET api/values/5
      public string Get(int id)
      {
          return "value";
      }
  
      // POST api/values
      public void Post([FromBody]string value)
      {
      }
  
      // PUT api/values/5
      public void Put(int id, [FromBody]string value)
      {
      }
  
      // DELETE api/values/5
      public void Delete(int id)
      {
      }
  }
  </code></pre>
  
  <p>to see if the help page is working, but it returns an empty <code>apidescription</code> collection for the below <code>GetApiExplorer()</code> call:</p>
  
  <pre><code>    public ActionResult Index()
      {
          return View(Configuration.Services.GetApiExplorer().ApiDescriptions);
      }
  </code></pre>
  
  <p>I can however use the example api controller by navigating to <code>/api/values</code> for example.</p>
  
  <p>Anyone know why the <code>apidescription</code> wouldn't be found?</p>