add link to local ssl proxy gist in readme

Author: catarak

README.md

@@ -29,6 +29,9 @@ This project is currently in development! It will be announced when there is a (
 8. Install the [React Developer Tools](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en).
 9. Open and close the Redux DevTools using `ctrl+h`, and move them with `ctrl+w`
 
+###Testing SSL on your local machine
+Please refer to [this gist](https://gist.github.com/andrewn/953ffd5cb17ac2634dc969fc7bdaff3f). This allows you to access the editor using both HTTP and HTTPS. Don't worry about this unless you need to make changes or test HTTPS behavior. 
+
 ##Production Installation
 1. Clone this repostory and `cd` into it
 2. `$ git submodule init`