add invoice_line_items form to to invoice form
remove unneeded var
add rest for line items
change invoice controller
add id for line_item
improve invoice line item handling TODO: line item destroy on destroy invoice
add destroy for line items when desroying invoice
add comment
create migration for colum rename
fix column names
fix params right typo
change null=>false and add draft as default
remove status from form
fix
fix
build db from scratch to get migration right