Easy Doc navigation

[evenstensberg]

Made it easier to navigate between documents.

[tcharlat]

Just reading the commits, I wonder : shouldn't the link have relative url ? I noticed some absolute links to your fork.

example : 'https://github.com/ev1stensberg/react-router/blob/master/docs/guides/ConfirmingNavigation.md'

[evenstensberg]

@Kallikrein thanks, been copy + pasting from my own repo, lol. I'll fix it in a jiffy!

[tcharlat]

You still use absolute url, I patched a file in an example commit for you.

-[Next Section - Histories](https://github.com/reactjs/react-router/blob/master/docs/guides/Histories.md)
+[Next Section - Histories](/docs/guides/Histories.md)

[evenstensberg]

Think that's a matter of preference, there's no big perf in leaving routes absolute. As well as some of the links are outside the current folder. I'll leave that for he review(if so)

[timdorr]

These docs aren't in any particular order, so having "next" links doesn't really apply. I'd look into helping on @knowbody's docs repo, so we can keep that ball rolling and eventually get that moved back here.

[evenstensberg]

FWIW- made each link redirected ( Next - Section ) according to the content overview.