Replace every occurence of UNTIS by Untis

aleksis/apps/untis/apps.py

aleksis/apps/untis/commands.py

aleksis/apps/untis/locale/ar/LC_MESSAGES/django.po

aleksis/apps/untis/locale/de_DE/LC_MESSAGES/django.po

aleksis/apps/untis/locale/fr/LC_MESSAGES/django.po

aleksis/apps/untis/locale/la/LC_MESSAGES/django.po

aleksis/apps/untis/locale/nb_NO/LC_MESSAGES/django.po

aleksis/apps/untis/locale/tr_TR/LC_MESSAGES/django.po

aleksis/apps/untis/menus.py

aleksis/apps/untis/model_extensions.py

aleksis/apps/untis/preferences.py

aleksis/apps/untis/util/mysql/importers/lessons.py

aleksis/apps/untis/util/mysql/main.py

aleksis/apps/untis/util/mysql/util.py