Add ES6 import example to "jsx in scope" docs

Author: gaearon

docs/rules/react-in-jsx-scope.md

@@ -22,6 +22,12 @@ var Hello = <div>Hello {this.props.name}</div>;
 
 The following patterns are not considered warnings:
 
+```js
+import React from 'react';
+
+var Hello = <div>Hello {this.props.name}</div>;
+```
+
 ```js
 var React = require('react');