Simple Form 3.0.0

This version add support to Rails 4 and drops entirely support to Rails 3 and Ruby 1.8. If you want support to these version use Simple Form 2.1

enhancements

• New input_class global config option to set a class to be generated in all inputs.
• Collection tags accept html attributes as the last element of collection @nashby
• Change default :value_method of collection tags from :last to :second @nashby
• Support Proc object in :conditions option of associations @bradly
• input_field supports html5 component @nashby
• Make field_error_proc configurable @dfens
• Support to Rails 4.
• Removed deprecated methods.
• SimpleForm no longer sets the size attribute automatically and the default_input_size setting
  is now deprecated.
• Support to aria-required attribute to required fields @ckundo

bug fix

• Make DateTimeInput#label_target method to work with string values in I18n.t('date.order') (default
  behaviour in Rails 4)
  Closes #846 @mjankowski
• Add "checkbox" class to the label of boolean input when there is no :label
  in generate_additional_classes_for config option @nashby
• Support models with digits in their names @webgago
• Remove deprecation warnings related to Relation#all from Rails 4.
• Form builder can be used outside the context of a controller @jasonwebster
• Skip pattern attribute when using validates_format_of with :without option @glebm