Ignore vim's tmp files.
Update gem's description and summary.
Actualiza versión de ruby.
Agrega rspec como dependencia de desarrollo.
Update to ruby 2.1
First basic step.
Add a second spec and create a basic dsl.
Add spec for specifying blocks for different set of fields.
Refactor to remove dsl class.
Add support for nested_attributes.
Add group_by.
Make the group_by option a method.
Refactor to include a more complete spec.