Add README

README.rst

+SEPA payment provider for django-payments
+=========================================
+
+This is a payment provider for `django-payments`_. It is intended for accepting
+payments via SEPA (bank transfer and direct debit).
+
+Current features
+----------------
+
+This project provides two payment providers:
+
+* ``djp_sepa.providers.PaymentPledgeProvider``, providing a generic form that
+  simply asks the customer to confirm the payment (for later manual processing)
+* ``djp_sepa.providers.DirectDebitProvider``, which collects a SEPA direct
+  debit mandate into the database
+
+Both providers, currently, require manual post-processing.
+
+Roadmap
+-------
+
+* Export of SEPA direct debit instructions as FinTS XML
+* Access to bank accounts using FinTS to discover payments made to a bank account
+
+.. _django-payments: https://django-payments.readthedocs.io/en/latest/