Simple invoice/billing with additional company fields

This extension will add three fields into administration store settings.
These fields are: Firm registration ID, Company ID, Bank account, Bills issuers place.

This extension will enable Invoice into Receipt creation within shop admin/orders page. Upon clicking the 'generate receipt' button within order invoice - the receipt generation function will change the display of the title "Invoice" and it will entitle the Invoice order into "Receipt". This will be saved for the book keeping records of the paid invoices with the invoice date and with a company additional details from three added fields in store settings, that will be added to both invoice and receipt for a more convenient business practice with complete business details when needed.