updated template for patient.jsp to include item quantity
updated InvoiceItem bean to handle patient_id, medicine_id, quantity, cost to act as linker between medicine and patients, this maps with the relational database having a third table for invoice_items
modified front and patient.jsp to handle this new invoiceItem object structure, the logic for gather patient detail and medicine detail from the item ids will be done by the servlet controller
implemented medicine population for patient.jsp from front controller. also removed uneeded template for getMedicineListbyPatientID as this will now be handled by the InvoiceItem structure instead
changed index.jsp checkbox buttons for medicine selection to quantity text fields to allow multiple quantity of each medicine