Removed .anonymous? check that is unneeded in Spree 2.1 login

Fixes #118
Update .travis.yml
Fix Rails 4.1 deprecation warning for confirm link_to attribute
Added pt-BR.yml file to config/locales with all the translations to português(BR)

Fixes #120
enabling set email with google_oauth2

Fixes #121
Merge branch 'source/2-1-stable'