fix : fixes sepandhaghighi#18

Author: sepandhaghighi

README.md

@@ -31,6 +31,7 @@
 - [Particles.js](https://github.com/VincentGarreau/particles.js/ "Particles.js")
 - [Font-Awesome Icon Set](http://fontawesome.io/ "Font-Awesome Icon Set")
 - [AddThis](http://www.addthis.com "AddThis")
+- [Shortcut.js](http://openjs.com/scripts/events/keyboard_shortcuts/ "Shortcut.js")
 
 ## Contributing