Translation to Brazilian Portuguese

Portuguese from Brazil and Portugal are alike, I created the same file
to both. Some portuguese guy can correct the Portugal version if they
use different words.
Implementing tunnel detection

Segmenting the IPv6 accesses into 2 new "protocols": Tun6to4 and Teredo.
Updated API to reflect those new "protocols".
Merge pull request #3 from foscarini/master

IPv6 tunnel detection