press - pr: Updates do pt_BR translation

Log Message:
-----------
Updates do pt_BR translation

Modified Files:
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pr/releases/8.3/br:
features83.html.br (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/press/pr/releases/8.3/br/features83.html.br.diff?r1=1.6&r2=1.7)
presskit83.html.br (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/press/pr/releases/8.3/br/presskit83.html.br.diff?r1=1.5&r2=1.6)
release.txt.br (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/press/pr/releases/8.3/br/release.txt.br.diff?r1=1.3&r2=1.4)