translate: pt-br

I created a pt-br.html file with the translated content.

To CSS work online in gh-pages, I put on CSS link tag a {{ site.url }}. I don't know if this is a good idea.
You can see working on http://diegoeis.github.io/code-guide/pt-br/

What you think?

PS: I called the developers of the Brazilian community to work on this project too. Check it out: http://tableless.com.br/code-guide-mdo/