Update guide.md node.js instructions

Update the instructions for requiring the EventEmitter in node.js

docs/guide.md

@@ -58,12 +58,18 @@ require(['EventEmitter'], function(EventEmitter) {
 });
 ```
 
-### node.js
+### node.js or Browser via Browserify
 
-This is pretty simple, just require the file and load the `EventEmitter` attribute out of it.
+This is pretty simple, just install the file via npm (or bower):
+
+```bash
+npm install wolfy87-eventemitter --save
+```
+
+...and then require it (if you used bower you have to require the relative path to the bower component)
 
 ```javascript
-var EventEmitter = require('./assets/js/EventEmitter').EventEmitter;
+var EventEmitter = require('wolfy87-eventemitter');
 var ee = new EventEmitter();
 ```
 
@@ -292,4 +298,4 @@ ee.addListener(/ba[rz]/, function () {
 	console.log('Now you are thinking with regular expressions.');
 });
 ee.emitEvent(/ba[rz]/);
-```
+```