add stylesheet; add story for Button component

storybook/config.js

@@ -2,13 +2,17 @@ import { configure } from '@kadira/storybook';
 import React from 'react';
 import { storiesOf, action } from '@kadira/storybook';
 
+import './storybook.css'
+// for now just simply $ rake asset:precompile && mv public/assets/application-ebf... storybook/application.css
+import './application.css'
+
 window.storiesOf = storiesOf;
 window.action = action;
 window.React = React;
 
 function loadStories () {
   require('./stories/loading_indicator.story.jsx');
-  // You can require as many stories as you need.
+  require('./stories/button.story.jsx');
 }
 
 configure(loadStories, module);