Merge pull request #6 from sthzg/feat_check_production_builds

Feature from @sthzg: #4 -- added DefinePlugin to plugins for dist builds (see https://github.com/weblogixx/react-webpack-template/issues/4)

cfg/dist.js

@@ -10,6 +10,9 @@ var config = _.merge({
   devtool: 'sourcemap',
   plugins: [
     new webpack.optimize.DedupePlugin(),
+    new webpack.DefinePlugin({
+      'process.env.NODE_ENV': '"production"'
+    }),
     new webpack.optimize.UglifyJsPlugin(),
     new webpack.optimize.OccurenceOrderPlugin(),
     new webpack.optimize.AggressiveMergingPlugin(),