Added install info to the README

Author: stanlemon

README.md

@@ -1,6 +1,19 @@
 # jGrowl 
 jGrowl is a jQuery plugin that raises unobtrusive messages within the browser, similar to the way that OS X's Growl Framework works. The idea is simple, deliver notifications to the end user in a noticeable way that doesn't obstruct the work flow and yet keeps the user informed.
 
+## Installation
+jGrowl can be added to your project using package managers like bower and npm or directly into your html using cdnjs, as well as the good old fashioned copy-paste into your project directory.
+
+Use cdnjs:
+	<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/jquery-jgrowl/1.2.12/jquery.jgrowl.min.js" />
+	<script src="//cdnjs.cloudflare.com/ajax/libs/jquery-jgrowl/1.2.12/jquery.jgrowl.min.js"></script>
+
+Install with bower
+	bower install https://github.com/stanlemon/jGrowl.git#master
+
+Install with 
+	npm install jgrowl
+
 ## Example usages
 	// Sample 1
 	$.jGrowl("Hello world!");