Regenerate gemspec for version 2.1.2

Regenerate gemspec for version 2.1.1

Regenerate gemspec for version 2.1.0

Merge pull request kitchenplan#51 from kitchenplan/cleanup

Kitchenplan 2.0 changes: stability, maintainability, and more configuration over recipes

Package gem dependencies to prevent failing bundle install runs

Mavericks compatible!