Update FAQ: Why should I use action creators?

[maxhallinan]

This adds a "Why should I use action creators?" section to the Actions FAQ. The answer is based on sources suggested in #1785 . cc: @markerikson

[markerikson]

Let's rephrase this, and add a bit of extra info in here as well.

First, I'd say that action creators are not a required part of Redux, and you can dispatch actions directly from a component if you want, but they are a good practice for several reasons. (I'd also remove the phrase "superior to inline actions".)

Would also be nice if we can squeeze in a mention that they aren't "just" an idea with Redux, but that Redux inherited the idea from the original Flux architecture, per the Flux docs at https://facebook.github.io/react/blog/2014/07/30/flux-actions-and-the-dispatcher.html#actions-and-actioncreators .

[maxhallinan]

Thanks for the review! I agree - 'superior to inline actions' has an imperious tone I didn't intend.

[maxhallinan]

@markerikson, I've expanded the first paragraph with your suggestions. Let me know what you think.

[markerikson]

I like it. Stamped!

[maxhallinan]

Thanks for the merge!