title: Adding a new IronPython WPF Window to complains "Window is not supported in a WPF project"
body: <p>Immediately after adding a brand new, untouched WPF window to my IronPython 2.7 project in VS2013 (with Python Tools for VS 2.0.11016), it tells me &quot;Invalid Markup&quot; in the design window, and the error list shows:</p>
  <blockquote>
  <p>Window is not supported in a Windows Presentation Foundation (WPF) project.</p>
  <p>Grid is not supported in a Windows Presentation Foundation (WPF) project.</p>
  </blockquote>
  <p>The XAML window has this innocuous looking code in it:</p>
  <pre><code>&lt;Window xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
          xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
          Title=&quot;Window1&quot; Height=&quot;300&quot; Width=&quot;300&quot;&gt;
      &lt;Grid&gt;
          
      &lt;/Grid&gt;
  &lt;/Window&gt;
  </code></pre>
  <p>Does Python tools for VS not really support form creation?  Did I forget to configure something?</p>