Update admin.py
remove form
adding check dd date enhanced.
remove import of ModeOfPaymentSelect form
Merge pull request #213 from jasvir99/dirty

adding check dd date enhanced.
changing deleivary address field to char type.
lookup modified
Changes done in bill reciept and voucher
Merge pull request #214 from aseemmittal/dirty

Changes done in bill reciept and voucher