creat net card scaffold
add net_card link on nav bar
add workflow in net_card model

set QUANTITY = 30

add  belongs_to relationship
add has_many: net_cards in user model
add net_card method
remove quantity stuff
fix bug and update net_card index view

bug: change review1 to reviewer1
add 3 workflow action to net_card controller
update net_card new form
update net_card show form