Merge pull request #87 from cdmain/patch-6

Update A-using-third-party-libraries.md

Author: dtauer

lessons/07-other-stuff-you-should-know/A-using-third-party-libraries.md

@@ -36,6 +36,7 @@ Make a new CSS file, put:
   height: 100px;
   background-color: #0074d9;
   border-radius: 50%;
+  position: relative;
 }
 
 body {