Readme file updated with documentation and example site.

Author: rmariuzzo

README.md

@@ -17,5 +17,8 @@ Installation
  1. Include jQuery into your HTML page.
  2. Include [`jQuery.checkboxes.min.js`](build/jquery.checkboxes.min.js) into your HTML page, just after jQuery.
 
+Documentation and example
+-------------------------
 
+Visit the [documentation site](http://rmariuzzo.github.io/checkboxes.js).