fix(AppContainer): remove named export to fix babel issue

Author: David Zukowski

src/containers/AppContainer.js

@@ -2,7 +2,7 @@ import React, { PropTypes } from 'react'
 import { Router } from 'react-router'
 import { Provider } from 'react-redux'
 
-export class AppContainer extends React.Component {
+class AppContainer extends React.Component {
   static propTypes = {
     history: PropTypes.object.isRequired,
     routes: PropTypes.object.isRequired,