revert dirty fix in routes

Author: Patrice Cadiot

src/routes.js

@@ -5,7 +5,7 @@ import Guidelines from './containers/Guidelines.jsx';
 import CodeOfConduct from './containers/CodeOfConduct.jsx';
 import Contributing from './containers/Contributing.jsx';
 
-return (
+export default (
   <Router history={browserHistory}>
     <Route path="/" component={Landing} />
     <Route path="/code_of_conduct" component={CodeOfConduct} />