Do not assert when an ISP changes its name (fix #14)

ffdnispdb/models.py

@@ -90,12 +90,6 @@ class ISP(db.Model):
         self.json = {}
 
     def pre_save(self, *args):
-        if 'name' in self.json:
-            assert self.name == self.json['name']
-
-        if 'shortname' in self.json:
-            assert self.shortname == self.json['shortname']
-
         if db.inspect(self).attrs.json.history.has_changes():
             self._sync_covered_areas()