Do not use add-module-exports. Also remove react-hot-loader

sokra says not to: webpack/webpack#2631 (comment)
it breaks b/c tries to insert

exports['default'] = module;

webpack.config.js

@@ -23,6 +23,7 @@ const UseMinifiedFiles = require( './server/bundler/webpack-plugins/use-minified
 const babelConfig = JSON.parse( fs.readFileSync( './.babelrc', { encoding: 'utf8' } ) );
 
 babelConfig.presets[ 0 ][ 1 ].modules = false;
+babelConfig.plugins = _.without( babelConfig.plugins, 'add-module-exports' );
 
 /**
  * Internal variables
@@ -152,10 +153,7 @@ const webpackConfig = {
 		new webpack.IgnorePlugin( /^props$/ ),
 		new CopyWebpackPlugin( [ { from: 'node_modules/flag-icon-css/flags/4x3', to: 'images/flags' } ] ),
 		new HappyPack( {
-			loaders: _.compact( [
-				process.env.NODE_ENV === 'development' && 'react-hot-loader',
-				babelLoader
-			] )
+			loaders: [ babelLoader ]
 		} ),
 		new webpack.NamedModulesPlugin(),
 		new webpack.NamedChunksPlugin( chunk => {