Translate into Brazilian Portuguese

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Include pt-BR code in guide.hbs

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge branch 'pt-BR' of github.com:rogeriopradoj/formatjs-site
Remove pt-BR from Guide