Merge pull request #37 from vivshaw/vivshaw-1486897405

Fix mixed content warning by switching 2 giphy links to https

Author: JessRudder

README.md

@@ -1,6 +1,6 @@
 # JavaScript Strings Lab
 
-![lab](http://i.giphy.com/NETCsDYm0fL44.gif)
+![lab](https://i.giphy.com/NETCsDYm0fL44.gif)
 
 ## Overview 
 
@@ -76,7 +76,7 @@ You'll find a file called `index.js` in this directory. Your mission, should you
 
 You can run the tests using the `learn` command in your terminal or the Learn IDE. Give that a go now.
 
-![waiting](http://i.giphy.com/9c830567WqLCw.gif)
+![waiting](https://i.giphy.com/9c830567WqLCw.gif)
 
 All three tests have failed! This is okay, and it's expected — you haven't written any code yet, after all.