title: Ghost doc to add "modified by" comment
body: <p>Is there a way to get ghost doc to modify an existing XML comment for a method (made by Ghost doc) to add a "modified by" line when you re run it on the method?</p>
  
  <p>I personally think this is what source control is for, but they want to do it in the XML,
  so it's a new work requirement.</p>