Add IntroJs Instant book

Author: afshinm

README.md

@@ -289,6 +289,17 @@ Now you can run this command to minify all static resources:
 
     make build
 
+## Instant IntroJs
+
+Want to learn faster and easier? Here we have **Instant IntroJs**, Packt Publishing.  
+
+<p align="center">
+  <a target='_blank' href="http://www.packtpub.com/create-useful-introductions-for-websites-and-applications-with-introjs-library/book"><img src='http://dgdsbygo8mp3h.cloudfront.net/sites/default/files/imagecache/productview_larger/2517OS_Instant%20IntroJS%20Starter.jpg' /></a>
+</p>  
+
+<p align="center">
+  <a target='_blank' href="http://www.packtpub.com/create-useful-introductions-for-websites-and-applications-with-introjs-library/book">Buy and Download</a>
+</p>
 
 ## Roadmap
 - More browser compatibility