Added some fixture data and updated payment models to make the payment source a model itself

TODO

 - Country field for addresses
 
 Sample shop:
-- How to have the admin site reflect your local models
+- How to have the admin site reflect your local models
+- Allow admin to be customised for your local project - can we inherit from oscar admin and add stuff?
+
+Products:
+- How to temporarily disable products so they aren't visible

oscar/payment/abstract_models.py

 from django.db import models
 from django.utils.translation import ugettext as _
 
-
 class AbstractSource(models.Model):
     """
     A source of payment for an order.  
     entry.
     """
     order = models.ForeignKey('order.Order', related_name='sources')
-    type = models.CharField(max_length=128)
-    initial_amount = models.IntegerField()
-    balance = models.IntegerField()
+    type = models.ForeignKey('payment.SourceType')
+    initial_amount = models.DecimalField(decimal_places=2, max_digits=12)
+    balance = models.DecimalField(decimal_places=2, max_digits=12)
     reference = models.CharField(max_length=128, blank=True, null=True)
     
     class Meta:
             description += " (reference: %s)" % self.reference
         return description
     
+class AbstractSourceType(models.Model):
+    """
+    A type of payment source (eg Bankcard, Business account, Gift card)
+    """
+    name = models.CharField(max_length=128)
+
+    class Meta:
+        abstract = True
+
+    def __unicode__(self):
+        return self.name
+
 class AbstractTransaction(models.Model):
     """
     A transaction for payment sources which need a secondary 'transaction' to actually take the money

oscar/payment/models.py

-from oscar.payment.abstract_models import AbstractSource, AbstractTransaction
+from oscar.payment.abstract_models import *
 
 class Source(AbstractSource):
     pass
 
+class SourceType(AbstractSourceType):
+    pass
+
 class Transaction(AbstractTransaction):
     pass