use codemirror

webpack-skeleton.js

@@ -47,6 +47,7 @@ var config = {
       react: 'var React',
       'react-dom': 'var ReactDOM',
       'react-redux': 'var ReactRedux',
+      'codemirror': 'var CodeMirror',
       'redux': 'var Redux'
     }
   ]