Adding a note just below the jQuery inclusion in the tutorial to inform that jQuery is not mandatory.

It's linked with #603

(cherry picked from commit 5eca8d604f)

docs/docs/tutorial.md

@@ -50,6 +50,8 @@ For this tutorial we'll use prebuilt JavaScript files on a CDN. Open up your fav
 
 For the remainder of this tutorial, we'll be writing our JavaScript code in this script tag.
 
+**Note:** We included jQuery but it's **NOT** mandatory for React to work.
+
 ### Your first component
 
 React is all about modular, composable components. For our comment box example, we'll have the following component structure: