title: How can I have linked dependencies in a git repo?
body: <p>In my scripts, I often use libraries (mine or others') that have their own repos. I don't want to duplicate those in my repo and get stuck with updating them every time a new version comes out. 
  However, when somebody clones the repo, it should still work locally and not have broken links.</p>
  
  <p>Any ideas about what I could do?</p>