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

web/react/components/member_list_team.jsx

@@ -1,7 +1,7 @@
 // Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
-const MemberListTeamItem = require('./member_list_team_item.jsx');
+import MemberListTeamItem from './member_list_team_item.jsx';
 
 export default class MemberListTeam extends React.Component {
     render() {