add management command

core/management/commands/set_campaign_editions.py

@@ -0,0 +1,14 @@
+from django.core.management.base import BaseCommand
+from regluit.core.models import Campaign
+
+class Command(BaseCommand):
+    help = "set campaign edition for every campaign"
+    
+    def handle(self, **options):
+        fixed = 0
+        for campaign in Campaign.objects.all():
+            if not campaign.edition:
+                campaign.edition = campaign.work.editions.all()[0]
+                campaign.save()
+                fixed +=1
+        print "{} campaign editions set".format(fixed)