setup React Storybook; add example story for LoadingIndicator component

.nvmrc

@@ -0,0 +1 @@
+6.7.0

package.json

@@ -1,6 +1,11 @@
 {
   "name": "mastodon",
+  "scripts": {
+    "storybook": "start-storybook -p 9001 -c storybook"
+  },
   "devDependencies": {
+    "@kadira/storybook": "^2.24.0",
+    "axios": "^0.14.0",
     "babel-plugin-react-transform": "^2.0.2",
     "babel-plugin-transform-object-rest-spread": "^6.8.0",
     "babel-preset-es2015": "^6.13.2",
@@ -8,17 +13,16 @@
     "babelify": "^7.3.0",
     "browserify": "^13.1.0",
     "browserify-incremental": "^3.1.1",
-    "react": "^15.3.0",
-    "react-dom": "^15.3.0",
-    "react-proxy": "^1.1.8",
-    "axios": "^0.14.0",
     "es6-promise": "^3.2.1",
     "immutable": "^3.8.1",
     "moment": "^2.14.1",
+    "react": "^15.3.0",
     "react-addons-perf": "^15.3.2",
     "react-addons-pure-render-mixin": "^15.3.1",
+    "react-dom": "^15.3.0",
     "react-immutable-proptypes": "^2.1.0",
     "react-notification": "^6.1.1",
+    "react-proxy": "^1.1.8",
     "react-redux": "^5.0.0-beta.3",
     "react-redux-loading-bar": "^2.3.3",
     "react-router": "^2.8.0",

storybook/config.js

@@ -0,0 +1,14 @@
+import { configure } from '@kadira/storybook';
+import React from 'react';
+import { storiesOf, action } from '@kadira/storybook';
+
+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.
+}
+
+configure(loadStories, module);

storybook/stories/loading_indicator.story.jsx

@@ -0,0 +1,6 @@
+import LoadingIndicator from '../../app/assets/javascripts/components/components/loading_indicator.jsx'
+
+storiesOf('LoadingIndicator', module)
+  .add('default state', () => (
+    <LoadingIndicator />
+  ));