Universal JS module loader

Hi Marrio,

Thank you for this great js plugin,we planned to use it in our project and it will be awesome if you convert your plugin to an Jquery Plugin.
check this Example to create an Universal JS module loader:
https://github.com/umdjs/umd/blob/master/templates/jqueryPlugin.js
could you please accept this Pull request ? :
https://github.com/marrio-h/universal-parallax/pull/17
Regards, 
 