settings in new files and validation

src/account/admin.py

src/account/migrations/0011_deadline.py

src/account/migrations/0012_auto_20180125_1957.py

src/account/models.py

src/account/serializers.py

src/kszkepzes/settings/__init__.py

src/kszkepzes/settings/base.py

src/kszkepzes/settings/local.py

src/kszkepzes/settings/production.py

src/kszkepzes/wsgi.py

src/manage.py