upgrades for support of new feature, root_key:
  - feature and inline doc added to lib/cupcakinator/base.rb
  - bump default ruby version for development
  - updates to Gemfile and Guardfile to support development
  - suppress i18n warning in lib/cupcakinator.rb
  - specs for new feature
Merge pull request #5 from rubyisbeautiful/1.1.0

upgrades for support of new feature, root_key: