title: Correctly package plugin that contains open-source licences
body: <p>I'm building a project that uses source from a project that's been built from a project that uses code under MIT and GNU licences.</p>
  
  <p>What steps do I need to take to make sure that the source has the correct licence files in the right places?</p>
  
  <p>The project in question is a php plugin for another app, not an executable. </p>