Spanish translation.

devise.es.yml adapted from https://gist.github.com/albertopadilla/1330093
Adds model spec coverage for country.rb
Merge pull request #268 from jasnow/master

Upgraded 3 gems by rebuilding Gemfile.lock file
Merge pull request #267 from rrgayhart/model-testing

Adds model spec coverage for country.rb
Merge pull request #264 from DrDub/master

Spanish translation.