Code Splitting with `webpack` and `react-imported-component`

Thread to track code splitting investigation and to write down related info and conclusions.

I’m going to start with this example and move from there to something more like what we need to implement in Frontity.

Awesome @orballo, let us know how it goes!

I think this thread is not useful anymore now that we have Which one should we use? react-imported-component vs loadable-components and Development micro-updates (or: who's working on what).