add webpack and babel config files

.babelrc

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+{
+    "presets": ["es2015", "react"]
+}

webpack.config.js

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+const webpack = require('webpack')
+const ExtractTextPlugin = require('extract-text-webpack-plugin')
+const CleanPlugin = require('clean-webpack-plugin')
+const cssnext = require('postcss-cssnext')
+
+const production = process.env.NODE_ENV === 'production';
+
+let plugins = [
+    new ExtractTextPlugin("bundle.css")
+]
+
+if (production) {
+    plugins = plugins.concat([
+
+        new CleanPlugin('./client/dist/assets'),
+
+        // This plugin looks for similar chunks and files
+        // and merges them for better caching by the user
+        new webpack.optimize.DedupePlugin(),
+
+        // This plugins optimizes chunks and modules by
+        // how much they are used in your app
+        new webpack.optimize.OccurenceOrderPlugin(),
+
+        // This plugin minifies all the Javascript code of the final bundle
+        new webpack.optimize.UglifyJsPlugin({
+            mangle: true,
+            compress: {
+                warnings: false, // Suppress uglification warnings
+            },
+        }),
+
+        // This plugins defines various variables that we can set to false
+        // in production to avoid code related to them from being compiled
+        // in our final bundle
+        new webpack.DefinePlugin({
+            __SERVER__: !production,
+            __DEVELOPMENT__: !production,
+            __DEVTOOLS__: !production,
+            'process.env': {
+                BABEL_ENV: JSON.stringify(process.env.NODE_ENV),
+                NODE_ENV: JSON.stringify(process.env.NODE_ENV),
+            },
+        }),
+
+    ]);
+}
+
+module.exports = {
+    debug: !production,
+    devtool: production ? false : 'source-map',
+    entry: './client/src/js/main.js',
+    output: {
+        path: './client/dist/assets',
+        filename: 'bundle.js'
+    },
+    module: {
+        loaders: [
+            {
+                test: /\.js/,
+                exclude: /node_modules/,
+                loader: 'babel',
+                include: __dirname + '/client/src/js/',
+            },
+            {
+                test: /\.scss/,
+                loader: ExtractTextPlugin.extract("style", "css!postcss!sass")
+            }
+        ]
+    },
+    postcss: [cssnext],
+    plugins: plugins
+}