Show system notifications for errors

Uses webpack-notifier under the hood. No setup necessary.
Supports Notification Center on OS X, Toaster on Windows 8 and later.
Falls back to Growl if present.

Ref facebook#89.

Author: goshacmd

config/webpack.config.dev.js

@@ -11,6 +11,7 @@ var path = require('path');
 var autoprefixer = require('autoprefixer');
 var webpack = require('webpack');
 var HtmlWebpackPlugin = require('html-webpack-plugin');
+var WebpackNotifierPlugin = require('webpack-notifier');
 
 // TODO: hide this behind a flag and eliminate dead code on eject.
 // This shouldn't be exposed to the user.
@@ -99,6 +100,7 @@ module.exports = {
     }),
     new webpack.DefinePlugin({ 'process.env.NODE_ENV': '"development"' }),
     // Note: only CSS is currently hot reloaded
-    new webpack.HotModuleReplacementPlugin()
+    new webpack.HotModuleReplacementPlugin(),
+    new WebpackNotifierPlugin(),
   ]
 };

package.json

@@ -53,7 +53,8 @@
     "style-loader": "0.13.1",
     "url-loader": "0.5.7",
     "webpack": "1.13.1",
-    "webpack-dev-server": "1.14.1"
+    "webpack-dev-server": "1.14.1",
+    "webpack-notifier": "1.3.0"
   },
   "devDependencies": {
     "bundle-deps": "^1.0.0",