recalculating only the new hanchans shoud do the trick now.

the racalc cronjob reports erronous partly recalculations now.
A lot of code cleanups

src/utils/massmailer.py

@@ -50,7 +50,6 @@ class MassMailer(object):
                 LOGGER.warning('%s is not a User Object!', recipient)
                 continue
             mail_context['recipient'] = recipient
-            print(recipient.__dict__)
             mail_to = "{first_name!s} {last_name!s} <{email!s}>".format(
                 **recipient.__dict__)
             message = django.core.mail.EmailMultiAlternatives(