Fix diacriticals in pt_BR translation.

This also fixes some typos.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Rephrase sentences to sound like real pt_BR.

We also fix some typos that slipped.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Fix capitalization in pt_BR.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Fix QoS capitalization for consistency in pt_BR.

While also being correct, we (tinily) also help compression of the messages
sent from/to the router.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Merge pull request #3 from rbrito/i18n-2013-ptbr

Fixes for ptbr translations.