Upgrade to ruby 2.1.2

Current version (2.1.1) on server was built using this patch https://gist.github.com/orendon/e99a98f5230b9f062143
This release fix the readline issue plus other improvements https://www.ruby-lang.org/en/news/2014/05/09/ruby-2-1-2-is-released/
Update ruby and rails versions on travis script file
Merge pull request #188 from orendon/update-to-ruby-2.1.2

Upgrade to ruby 2.1.2