Update react-router to v4

[piotrwitek]

• update dependencies
• rewrite componenets
• test and update react-router-redux

[jaytaylor]

Just a heads up:

It looks like react-router is already at v4 since the last two weeks.

https://github.com/ReactTraining/react-router/releases

[piotrwitek]

Thanks :) For v4 I'm waiting for it to leave alpha, because API can probably break.

[piotrwitek]

as react-router v4 beta was released, we can come back to updating code to use v4

[estaub]

AFAICT from the doc, react-router-redux (which just moved into react-router) is probably not compatible with r-r v4, and you need to wait (as I am) for v5 of react-router-redux. However, the doc isn't entirely clear on it.