update travis to use ruby 2.1.4
update travis to use ruby 2.1.4

ipmobiletech/backbone-rails,ipmobiletech/backbone-rails,ipmobiletech/backbone-rails,ArthurN/backbone-rails,codebrew/backbone-rails,ArthurN/backbone-rails,codebrew/backbone-rails,codebrew/backbone-rails,ArthurN/backbone-rails