title: Drupal content type - populate Title field via Entity Reference
body: <p>I'm creating two custom <strong>content types</strong> for a Drupal 7 site - let's call them "Job Postings" and "Job Applications" since that illustrates the relationship between the two.</p>
  
  <p>When a new Job Application is created, I want the Title to be the same as the Job Posting that it is for. The user will be getting to the new Job Application creation page via a link from a Job Posting display. I will pass the Job Posting node id to the Job Application   creation page in the URL, and grab it via Entity reference prepopulate into a hidden field.</p>
  
  <p>What I'm <em>not</em> seeing is how to use Entity Reference to populate the Title of the new Job Application. </p>
  
  <p>The Title has a field type of "Node Module Element" and it is required - and that doesn't seem modifiable. What I really <em>want</em> it to be is a field that pulls the Title from the associated Job Posting. I <em>don't</em> want the user to have to type the Title in freeform.</p>
  
  <p>So actually, the question is twofold:</p>
  
  <ol>
  <li><p>How do I pull in the job title from the Job Posting at all - I want to pass the node id of the Job Posting in the URL and then use <em>that</em> to look up the Title, I don't want to pass in the title itself (too much potential for abuse).</p></li>
  <li><p>How do I specifically pull the Job Posting title in to the Title field of the new Job Application, which seems pretty impervious to being anything but what it is?</p></li>
  </ol>