title: squishit gives 304 (not modified) instead of 200 (from cache)
body: <p>I am using "SquishIt" for combining my .js and .css files.
  The problem is that the squishit bundle results in a 304 (not changed) when all other resources are 200 (from cache). If I put the files in the regular way I get the wanted 200 result.
  An example of my code:</p>
  
  <pre><code>@MvcHtmlString.Create(@Bundle.JavaScript().Add("~/Scripts/Libs/jquery.cookie.js").Add("~/Scripts/Libs/jquery.dynatree.min.js").Add("~/Scripts/Libs/jquery.json-2.3.min.js").Add("~/Scripts/Libs/jsrender.js").Add("~/Scripts/Libs/jstorage.min.js").Add("~/Scripts/Common/utils.js").Add("~/Scripts/DataServices/AccountDataServices.js").Add("~/Scripts/AccountSelection.js").WithMinifier&lt;SquishIt.Framework.Minifiers.JavaScript.MsMinifier&gt;().Render("~/Scripts/AccSelectionscriptBandle_#.js"))
  </code></pre>
  
  <p>The result:</p>
  
  <p><img src="https://i.stack.imgur.com/GDJCl.png" alt="enter image description here"></p>
  
  <p><strong>EDIT</strong>:
  I am using "Debug=false";
  All other resources are 200 (from cache)</p>