facelift README

[ulysses4ever]

Mostly, remove extraneous spaces between [] and () in MD-style hyperlinks.

[curiousleo]

LGTM - this definitely makes the README nicer to look at.

I think the README will probably need an overhaul once #62 lands, but until then, I think this is an incremental improvement worth merging.

[lehins]

This is an improvement, so thank you @ulysses4ever but @curiousleo let's wait until #62 is merged into master.

[Bodigrim]

@lehins it should be trivial to rebase #62 atop of this, when it is ready to be merged. I feel important to merge such PRs, encouraging people to improve documentation.

[lehins]

@Bodigrim I literally just reset master to v1.1 tag today to avoid unnecessary rebasing, because there is a lot of commits and enormous amount of changes in #62. Let's just wait till next week, this is not a critical change. Moreover, the link still needs fixing

I'd appreciate if you could give #62 a review though, if you have time that is ;) That would be really helpful.

[ulysses4ever]

@lehins the link should be fixed now.