Upgrading client dependancies. Upgrading to babel 6. Moving to es6 package system.

web/react/stores/preference_store.jsx

@@ -1,11 +1,12 @@
 // Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
 // See License.txt for license information.
 
-const ActionTypes = require('../utils/constants.jsx').ActionTypes;
-const AppDispatcher = require('../dispatcher/app_dispatcher.jsx');
-const BrowserStore = require('./browser_store.jsx');
-const EventEmitter = require('events').EventEmitter;
-const UserStore = require('../stores/user_store.jsx');
+import Constants from '../utils/constants.jsx';
+const ActionTypes = Constants.ActionTypes;
+import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
+import BrowserStore from './browser_store.jsx';
+import EventEmitter from 'events';
+import UserStore from '../stores/user_store.jsx';
 
 const CHANGE_EVENT = 'change';