Reorganize karma and webpack configs

webpack.config.js

@@ -0,0 +1,33 @@
+var webpack = require('webpack')
+
+const DIST_DIRECTORY = './dist'
+
+module.exports = {
+  entry: {
+    main: DIST_DIRECTORY
+  },
+  externals: [{
+    'react': true,
+    'react-dom': true,
+    'react-dom/server': true
+  }],
+  output: {
+    filename: 'react-native-web.js',
+    library: 'ReactNativeWeb',
+    libraryTarget: 'umd',
+    path: DIST_DIRECTORY
+  },
+  plugins: [
+    new webpack.DefinePlugin({ 'process.env.NODE_ENV': JSON.stringify('production') }),
+    new webpack.optimize.DedupePlugin(),
+    new webpack.optimize.OccurenceOrderPlugin(),
+    new webpack.optimize.UglifyJsPlugin({
+      compress: {
+        dead_code: true,
+        drop_console: true,
+        screw_ie8: true,
+        warnings: true
+      }
+    })
+  ]
+}