create crud actions, add validatiton, add custom validator, add simple_form gem
hound refactor
hound refactor 2
before_action for DRY controller, refactor
cards_controller, encapsulate find_card method
index.html.erb card_review_date.nil? fix
Merge pull request #3 from bfgtyurin/task03

create crud actions, add validatiton, add custom validator