title: CSRF error when using rest_framework.authtoken.views.obtain._auth_token
body: <p>I am calling <code>obtain.auth_token</code> from urls as follows </p>
  
  <pre><code>url(r'^api-token/','rest_framework.authtoken.views.obtain_auth_token')
  </code></pre>
  
  <p>I get back </p>
  
  <pre><code>{
  detail: "CSRF Failed: CSRF token missing or incorrect."
  }
  </code></pre>
  
  <p>I am wondering why this happends as I was under the impression django-rest-framework was usualy CSRF exempt </p>
  
  <p>Thanks</p>