Merge pull request reduxjs#1418 from nhjk/update_docs

Update package name in docs

Author: gaearon

docs/advanced/AsyncActions.md

@@ -381,7 +381,7 @@ export function fetchPosts(subreddit) {
 
 >```js
 >// Do this once before any other code in your app
->import 'babel-core/polyfill'
+>import 'babel-polyfill'
 >```
 
 How do we include the Redux Thunk middleware in the dispatch mechanism? We use the [`applyMiddleware()`](../api/applyMiddleware.md) store enhancer from Redux, as shown below:

docs/advanced/ExampleRedditAPI.md

@@ -7,7 +7,7 @@ This is the complete source code of the Reddit headline fetching example we buil
 #### `index.js`
 
 ```js
-import 'babel-core/polyfill'
+import 'babel-polyfill'
 
 import React from 'react'
 import { render } from 'react-dom'