Handle IoC/DI Gap

[MatthewVita]

In the Angular v1 world, IoC/DI are used heavily. We didn't talk about how to accomplish the same in React/Redux (or, at least, reasons why these patterns aren't directly used).

Is this worth adding to the guide, @danielehrlich ?

I'm not going to tie this to a release label at the moment until we make a decision about if it's in scope / is relevant.