Translation for Portuguese and Portuese-Brazil

I already translated 3 or 4 missions and until now, I were renaming the folder just to "pt", but I saw 2 different portuguese languages in checkio system. That is right, the portuguese of Brazil have a couple of differents word from Portugal, but I will make it ready for any person from portugal that just speaks portuguese to understood the mission. If some word get trouble, it's changeable by github.
The pull request says "2 contributos", but its me and myself: github and git accounts.