Some refactoring between accounting and counter

counter/admin.py

@@ -1,6 +1,9 @@
 from django.contrib import admin
 
-from counter.models import Counter
+from counter.models import *
 
 # Register your models here.
+admin.site.register(Customer)
+admin.site.register(ProductType)
+admin.site.register(Product)
 admin.site.register(Counter)