title: Axios expose response headers: Content-Disposition
body: <p>I was able to set request headers to expose Content-Disposition by adding:
  &quot;Access-Control-Expose-Headers&quot;: &quot;Content-Disposition&quot;</p>
  <p>I can see the response but the response object does not include Content-Disposition.
  <a href="https://i.stack.imgur.com/qHPg5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qHPg5.png" alt="headers" /></a></p>
  <p>Is there any way i can access that value?</p>
  <p>axios version: 0.15.2
  Environment: node v6.9.4, chrome 54, windows 7</p>