Add Views, Styles and javascript sections

docs/en/customization/javascript.md

@@ -0,0 +1,15 @@
+# Javascript
+
+If you want to add some custom Javascript code, `app/assets/javascripts/custom.js` is the file to do it. For example to create a new alert just add:
+
+```js
+$(function(){
+  alert('foobar');
+});
+```
+
+If you work with Coffeescript code you can check it with [coffeelint](http://www.coffeelint.org/) (install with `npm install -g coffeelint`) :
+
+```bash
+coffeelint .
+```