Updated template tag contect to allow CSRF to be used

oscar/apps/promotions/templatetags/promotions.py

 from django.template import Library, Node, Variable, Context
 from django.template.loader import select_template
+from django.template import RequestContext
+
      
 register = Library()
      
     def render(self, context):
         promotion = self.promotion_var.resolve(context)
         template = select_template([promotion.template_name(), 'promotions/default.html'])
-        args = dict(promotion=promotion, **promotion.template_context(request=context['request']))
+        args = dict(promotion=promotion, 
+                    **promotion.template_context(request=context['request'])
+                    context_instance=RequestContext(context['request']))
         return template.render(Context(args))
  
 def get_promotion_html(parser, token):

oscar/core/validators.py

 from django.http import Http404
 from django.utils.translation import ugettext_lazy as _
 
+
 class ExtendedURLValidator(validators.URLValidator):
     def __call__(self, value):
         try: