Give the README some markdown love

[tripu]

Simply by renaming README to README.md we get nice markdown formatting on GH.

On top of that, here go a few improvements; the diff looks huge, but you'll see I've changed only headings, indentation, formatting and added useful hyperlinks (the copy itself has not changed, except for one or two typos I've fixed along the way).

See the result here.

[tripu]

Does this look good, then?

[tripu]

:bell:

[tripu]

@kaptoxic, care to review?

(It's difficult to find committers to this project who have not abandoned GH already.)

[ikuraj]

This indeed LGTM. (Note that I don't have write access to merge the PR.)

[tripu]

Thanks, @kaptoxic. Do you know who has?

[ikuraj]

No. :/

[tripu]

Perhaps @jkbzh or @bagder?

[bagder]

Nopes, I didn't even know it was on github... :-O

[tripu]

The maintainer of this repo told me privately that they don't approve these changes, so closing it.