added list of all payments
added start of paginator
made last slash optional
restructured templates
introduced company settings.
added pdf invoice generation
print values of Order model
check if new pages need to be added
download invoice as pdf
fixed call to view
can download invoice of an order.
form to create custom invoices
can create and update clients.
store order items and product of invoice
added payment reminder
change invoice nunber generator.
styled invoice a little
styled invoice table
show client detail view with it's invoices
added check step to wizard