make CommonsChunkPlugin in webpack.dev.conf.js

Author: Ken Berkeley

build/webpack.dev.conf.js

@@ -35,7 +35,9 @@ config.module.loaders.push({
 });
 
 config.plugins.push(
-  new webpack.optimize.OccurenceOrderPlugin(),
+  new webpack.optimize.CommonsChunkPlugin({
+    name: 'vendor'
+  }),
   new webpack.HotModuleReplacementPlugin(),
   new webpack.NoErrorsPlugin(),
   new ExtractTextPlugin('[name].css'),