Merge pull request #5 from jianaijun/master

Fixed does not correctly handle client HTTP_ACCEPT_LANGUAGE is language/country combination issue.
Preparing release 2.0.6
Back to development: 2.0.7
split both POSIX and IETF locales
Preparing release 2.0.7
Back to development: 2.0.8
add Portuguese normalizer
fix MANIFEST.in
Preparing release 2.0.8
Back to development: 2.0.9