Add introjs drupal integration + add cdn hosts

Author: afshinm

README.md

@@ -6,7 +6,9 @@
 ## How to use
 Intro.js can be added to your site in three simple steps:
 
-**1)** Include `intro.js` and `introjs.css` (or the minified version for production) in your page. 
+**1)** Include `intro.js` and `introjs.css` (or the minified version for production) in your page. Use `introjs-rtl.min.css` for Right-to-Left language support.
+
+> CDN hosted files are available at [jsDelivr](http://www.jsdelivr.com/#!intro.js) (click Show More) & [cdnjs](http://cdnjs.com/#introjs).
 
 **2)** Add `data-intro` and `data-step` to your HTML elements.  
 
@@ -276,6 +278,8 @@ If you are using the rails asset pipeline you can use the [introjs-rails](https:
 ### Yii framework
 You can simply use this project for Yii framework: https://github.com/moein7tl/Yii-IntroJS
 
+### Drupal
+Here you can find an IntroJs integration for Drupal: https://drupal.org/sandbox/alexanderfb/2061829
 
 ## Build