docs: add links to the 'webpack 4' example

Author: matteocng

README.md

@@ -35,9 +35,9 @@ Apps bootstrapped with [`create-react-app`](https://github.com/facebookincubator
 
 ## Prerequisites for *custom* apps
 
-We recommend using the [`webpack 4`](//github.com/webpack/webpack) module bundler and ecosystem to *assemble* your app, but this module also works with `webpack 3`, `webpack 2` and `webpack 1` and should work with other bundlers.
+We recommend using the [`webpack 4`](//github.com/webpack/webpack) module bundler and ecosystem to *assemble* your app, even though this module works with `webpack >= 1` and should also work with other bundlers.
 
-If you are using `webpack`, you will need to install and configure a few commmonly used modules (see the [webpack 3 example project](//github.com/matteocng/react-flag-icon-css-example-multi), or the [webpack 2](https://github.com/matteocng/react-flag-icon-css-example-multi/tree/webpack-2), [webpack 1](https://github.com/matteocng/react-flag-icon-css-example-multi/tree/webpack-1) versions of it):
+If you are using `webpack`, you will need to install and configure a few commmonly used modules - see the [webpack 4 example project](//github.com/matteocng/react-flag-icon-css-example-multi) (also available for: [webpack 3](https://github.com/matteocng/react-flag-icon-css-example-multi/tree/webpack-3), [webpack 2](https://github.com/matteocng/react-flag-icon-css-example-multi/tree/webpack-2), and [webpack 1](https://github.com/matteocng/react-flag-icon-css-example-multi/tree/webpack-1)).
 
 ```bash
 $ yarn add -D babel-loader css-loader file-loader style-loader extract-text-webpack-plugin