Adding webpack code splitting (#3377)

webapp/components/create_team/components/display_name.jsx

@@ -10,7 +10,7 @@ import logoImage from 'images/logo.png';
 
 import React from 'react';
 import ReactDOM from 'react-dom';
-import {Link} from 'react-router';
+import {Link} from 'react-router/es6';
 import {FormattedMessage} from 'react-intl';
 
 export default class TeamSignupDisplayNamePage extends React.Component {

webapp/components/create_team/create_team_controller.jsx

@@ -4,7 +4,7 @@
 import ErrorBar from 'components/error_bar.jsx';
 
 import {FormattedMessage} from 'react-intl';
-import {browserHistory, Link} from 'react-router';
+import {browserHistory, Link} from 'react-router/es6';
 
 import React from 'react';