Smaller production builds

Builds on the exclusion of PropTypes from production builds:

- Remove 'lodash' and use smaller modules for equivalent functions.
- Remove use of some unnecessary Facebook utilities.
- Remove 'TouchableBounce'; it isn't part of React Native anymore.
- Remove stray import of 'react-dom/server'.
- Exclude 'StyleSheetValidation' from production.

Measuring the UMD build (gzip)…

Before: ~100KB
After: ~60KB

webpack.config.js

@@ -25,7 +25,10 @@ module.exports = {
     path: DIST_DIRECTORY
   },
   plugins: [
-    new BundleAnalyzerPlugin({ analyzerMode: 'static' }),
+    new BundleAnalyzerPlugin({
+      analyzerMode: 'static',
+      openAnalyzer: false
+    }),
     new webpack.DefinePlugin({ 'process.env.NODE_ENV': JSON.stringify('production') }),
     new webpack.optimize.DedupePlugin(),
     // https://github.com/animatedjs/animated/issues/40