Merge branch '4-support-import-from-mysql' into 'master'

aleksis/apps/untis/api.py

aleksis/apps/untis/api_helper.py

aleksis/apps/untis/datetimeutils.py

aleksis/apps/untis/drive.py

aleksis/apps/untis/events.py

aleksis/apps/untis/forms.py

aleksis/apps/untis/management/commands/untis_import_mysql.py

aleksis/apps/untis/management/commands/untis_import_xml.py

aleksis/apps/untis/menus.py

aleksis/apps/untis/model_extensions.py

aleksis/apps/untis/models.py

aleksis/apps/untis/parse.py

aleksis/apps/untis/plan.py

aleksis/apps/untis/settings.py

aleksis/apps/untis/sub.py

aleksis/apps/untis/tasks.py

aleksis/apps/untis/templates/untis/xml_import.html

aleksis/apps/untis/urls.py

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

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