Potential "Edit on GitHub" improvements

[Trott]

Saw this as a footer on MDN docs and thought it might be worth emulating.

@Trott: Just for a quick modification, I've splitted the footer into two splits in verticle, is it right? Any suggestions for the formation?

[Trott]

Looks good to me.

I hate to say it because it was a great effort to make it happen, but I wonder if we want to get rid of the "Thanks you" box. It was a nice idea (I think it was my suggestion even), but no one sees it where it is, and we need to really start thinking about the website serving the user, which that box really doesn't do.

[Trott]

@MaledongGit Thanks for working on this!

@Trott: I'll submit a PR affter removing the contributors, however I'll open another Issue to have a discussion on it.