new commit
Implementing account system
New Customer Interface!

editing product has border
Redone inputing and Reworked order

Can input space (use getline now)
Implement transaction history
Ordering now reduce the stock
No transaction show different message
You can now confirm your order to pay!

Current transaction not included in history
Sorting the products
Show product detail when editing
Can hide empty stock from customer
Documentation
Order list has total price
the products persist!
decorate product list
the users persist!
decorate products list again
admin interface new options (not functional)
can view customers record

fix user account bug
trivial spacing
password changeable
automatic ID generation
catching exceptions