title: Mailchimp API 3.0 fetch all merge-fields including E-Mail
body: <p>I am currently building a little PHP script that fetches the merge-fields for a list and then automatically builds a small subscription form for that list.</p>
  
  <p>However I am having problems since the only API call I was able to find was: 
  <code>3.0/lists/{list_id}/merge-fields</code> (<a href="http://kb.mailchimp.com/api/resources/lists/merge-fields/lists-merge-fields-collection" rel="nofollow noreferrer">documentation link here</a>)</p>
  
  <p>This properly returns all the fields that are user defined but it omits the email field which is created by default. However I need to fetch the email field as well in order to check the label, as well as the position within the form. Is there an easy way to do that?</p>
  
  <p>I have also tried to use
  <code>3.0/lists/{list_id}/merge-fields/0</code> (since the email field got the merge_id '0') which unfortunately does not work either. If I replace the zero with another number then the proper merge-field is returned.</p>
  
  <p>Any ideas if there is a way to retrieve the E-Mail field at all?
  Any hints are welcome! :)</p>