title: SVN: How to add new external directory not under version control to existing repository?
body: <p>To better ask my question, I need to explain my current setup:</p>
  
  <p>I have a test web environment set up under <code>/var/www/dev</code> which I use as a sandbox.<br>
  I have an e-commerce app installed under <code>/var/www/shop</code> which is set up as an alias for both my sandbox and beta environments.  </p>
  
  <p><code>/var/www/dev</code> is under version control, <code>/var/www/shop</code> is not.  What I would like to do is to somehow add the shop directory to the dev repository without moving the location of either directories.  Like a symbolic link...  </p>
  
  <p>First, is this even possible?  If not, is there a way to "join" repositories so that when I check out or commit to the "main" one, they are both checked out / committed?  Or is there maybe a better way of accomplishing this altogether?  </p>
  
  <p>Thanks in advance!</p>