app/views/exports/show.csv.csview
csv << [:person_name, :person_function, :person_city, :visible, :confirmed_at].collect { |field| Signature.human_attribute_name(field) }
@signatures.each do |signature|
csv << [
signature.person_name,
signature.person_function,
signature.person_city,
signature.visible.to_s,
signature.confirmed_at.to_s
]
end