Email functionality

System should be able to send emails.

There are two issues that require this functionality: #80 (closed), #81 (closed)

System should be configurable (smtp server, login, password, email, etc)

there is apparently a django built-in feature for this: https://docs.djangoproject.com/en/1.10/topics/email/

for scheduled tasks, I found this: http://django-cron.readthedocs.io/en/latest/introduction.html that doesn't look too bad.

assigned to @piotr.gawron

created branch 82-email-functionality

mentioned in merge request !42 (merged)

closed via commit 42698332

closed via merge request !42 (merged)