add site settings model

pandora/app/models.py

@@ -11,3 +11,11 @@ class Page(models.Model):
 
     def __unicode__(self):
         return self.name
+
+class SiteSettings(models.Model):
+    key = models.CharField(max_length=1024, unique=True)
+    value = models.TextField(blank=True)
+
+    def __unicode__(self):
+        return self.key
+