Module tweaks

Hey guys! This pull request contains the main changes we did this afternoon to get that loop working correctly, with links to the module page and so forth, as well as that extra nested layout thing I showed you at the end. If you merge it in, these changes will be updated in your main repo, but if you’d rather not do that then you can just look at the diff and make the changes you want yourselves. Up to you. :grin: 

Let me know if you have any questions! Thanks again for the interest in using GitHub for this part of your course—I can’t wait to see how it turns out :+1: 

/cc @fehler @timpotter @PixelPaper