doh - added knockout-rails
doh - converted receipts to activerecord model
doh - introduced directory iterator
doh - refactored directory iterator and receipt logic
doh - ignoring .DS_Store
doh - renamed file_created_at to date
doh - renamed files to receipts
doh - renamed and refactored expenses controller/view to receipts/index
doh - refactored view to update multiple records