Revert "Updated README Link import"

[Alexendoo]

This reverts commit e195068.

activeClassName requires Link to be imported from match.js

[pmkroeker]

When I was testing I found that I had to import Link from root. Gave me errors trying to import from match.js.

[Alexendoo]

What errors did you run into? The link exported by the root and match do different things, only the one in match supports the activeClassName thing displayed in the README

[pmkroeker]

I was getting match does not export Link, which after looking at the code seems strange. Maybe it was an unrelated issue. Next time I'm using it I'll see what happens.

[marvinhagemeister]

Having two components with the same name do different things is confusing. Maybe we should revisit that decision and combine them or export them as different names all together?

[Alexendoo]

I think that would be a good idea. Perhaps we could bring in match.js's contents to index.js, with a re-export so it's not a breaking change.

[JLWalsh]

I 100% support this PR, I was really confused and had to dive in the code to figure out that there's a link exported by the router and a link exported by the match.

[developit]

If we can golf the size of match.js down, merging it into index.js is fine by me. I just didn't want to pay the extra 500b.