Brazilian Portuguese translation.

By José Inácio Serafini and Leonardo Siqueira Rodrigues.
Added it version of history.txt
Fixed some typos in it version of branch.txt
Fixed some minor typos in it/clone.txt
Fixed some minor typos in it/basic.txt
Fixed some minor typos in it/intro.txt
Fixed some minor typos in it/translate.txt
created fork on github.com and added pl directory for polish translation
Added it/multiplayer.txt
first quick and dirty translation from german translation using omegat
file basic.txt ready
file brunch.txt ready
file clone.txt ready
file drawbacks.txt ready
file grandmasters.txt ready
file history.txt translated partially
branch test created
prepared for make test
probleme
probleme