Fix #978 -- Allow to split names (#1049)

- [x] attendee names
- [x] Invoice address names
- [x] Data migration
- [x] API serializers
  - [x] orderposition
  - [x] cartposition
  - [x] invoiceaddress
  - [x] checkinlistposition
- [x] position API search
- [x] invoice API search
- [x] business/individual required toggle
- [x] Split columns in CSV exports
- [x] ticket editor
- [x] shredder
- [x] ticket/invoice sample data
- [x] order search
- [x] Handle changed naming scheme
- [x] tests
- [x] make use in:
  - [x] Boabee
  - [x] Certificate download order
  - [x] Badge download order
  - [x] Ticket download order
- [x] Document new MySQL requirement
- [x] Plugins

src/setup.cfg

@@ -13,7 +13,7 @@ known_third_party = versions
 known_standard_library = typing,enum,mimetypes
 multi_line_output = 5
 not_skip = __init__.py
-skip = make_testdata.py,wsgi.py,bootstrap,celery_app.py,settings.py
+skip = make_testdata.py,wsgi.py,bootstrap,celery_app.py,pretix/settings.py,tests/settings.py,pretix/testutils/settings.py
 
 [tool:pytest]
 DJANGO_SETTINGS_MODULE=tests.settings