docs(examples): add an example

Add an example of a webpack config taken from a [React Hot Loader 3](gaearon/react-hot-boilerplate#61) PR as an example implementation of it.

�enter the commit message for your changes. Lines starting

other/EXAMPLES.md

@@ -1,3 +1,59 @@
 # Examples
 
-There's nothing here! [But PRs are welcome!](http://makeapullrequest.com)
+## React Hot Loader with `webpack-config-utils`
+
+```js
+const path = require('path')
+const webpack = require('webpack')
+const {getIfUtils, removeEmpty} = require('webpack-config-utils')
+
+const {ifDevelopment, ifProduction} = getIfUtils(process.env.NODE_ENV)
+
+module.exports = {
+  devtool: 'eval',
+  entry: removeEmpty([
+    ...ifDevelopment([
+      'webpack-dev-server/client?http://localhost:3000',
+      'webpack/hot/only-dev-server',
+      'react-hot-loader/patch',
+    ]),
+    './index'
+  ]),
+  output: {
+    path: path.join(__dirname, 'dist'),
+    filename: 'bundle.js',
+    publicPath: '/static/'
+  },
+  plugins: removeEmpty([
+    new webpack.optimize.OccurrenceOrderPlugin(),
+    ...ifDevelopment([
+      new webpack.HotModuleReplacementPlugin(),
+      new webpack.NoErrorsPlugin(),
+    ]),
+    ...ifProduction([
+      new webpack.DefinePlugin({
+        'process.env': {
+          'NODE_ENV': '"production"',
+        },
+      }),
+      new webpack.optimize.UglifyJsPlugin({compressor: {warnings: false}}),
+    ]),
+  ]),
+  module: {
+    loaders: [{
+      test: /\.js$/,
+      loaders: ['babel'],
+      exclude: /node_modules/,
+      include: __dirname
+    }, {
+      test: /\.js$/,
+      loaders: ['babel'],
+      include: path.join(__dirname, '..', '..', 'src')
+    }, {
+      test: /\.css?$/,
+      loaders: ['style', 'raw'],
+      include: __dirname
+    }]
+  }
+}
+```