Updated Brazilian Portuguese translation

Signed-off-by: Rafael Ferreira <rafael.f.f1@gmail.com>
Merge branch 'release-2.0.0' of git://github.com/josephgbr/TSC into release-2.0.0
Fix copyright statement in pt_BR translation based on commit 5d728b8018277d4c17dd9499275da3b38e31ad1a.