title: How to combine two projects in Mercurial?
body: <p>I have two separate mercurial repositories. At this point it makes sense that they "become one" because I want to work on the two projects simultaneously.</p>
  
  <p>I'd really like the two projects to each be a subdirectory in the new repository.</p>
  
  <ol>
  <li>How do I merge the two projects?</li>
  <li>Is this a good idea, or should I
  keep them separate?</li>
  </ol>
  
  <p>It seems I ought to be able to push from one repository to the other... Maybe this is really straight forward?</p>