Rewrite benchmarks app

Reorganizes and rewrites the benchmarks. Each implementation is now
self-contained and the benchmarks can be run using a GUI. The benchmarks
themselves have been changed so that individual tests render over a
shorter time frame and more samples are taken.

packages/benchmarks/webpack.config.js

@@ -30,7 +30,7 @@ module.exports = {
         use: {
           loader: 'babel-loader',
           options: {
-            cacheDirectory: true,
+            cacheDirectory: false,
             presets: babelPreset,
             plugins: ['react-native-web']
           }
@@ -49,14 +49,10 @@ module.exports = {
     new webpack.optimize.UglifyJsPlugin({
       compress: {
         dead_code: true,
+        drop_console: true,
         screw_ie8: true,
         warnings: false
       }
     })
-  ],
-  resolve: {
-    alias: {
-      'react-native': 'react-native-web'
-    }
-  }
+  ]
 };