* Data model and migration
* Some backwards compatibility
* CRUD for checkin lists
* Show and perform checkins
* Correct numbers in table and dashboard widget
* event creation and cloning
* Allow to link specific exports and pass options per query
* Play with the CSV export
* PDF export
* Collapse exports by default
* Improve PDF exporter
* Addon stuff
* Subevent stuff, pretixdroid tests
* pretixdroid tests
* Add CRUD API
* Test compatibility
* Fix test
* DB-independent sorting behavior
* Add CRUD and coyp tests
* Re-enable pretixdroid plugin
* pretixdroid config
* Tests & fixes
* [WIP] manual check-in of attendees
This enables manual check-in of attendees. The post-code was heavily
copied from the APIRedeemView of the pretixdroid, thus so far this seems
to be working, but I have a few questions:
The checkin-Objects generated by the pretixdroid-app have a nonce.
Should the checkin object generated here have a nonce, too?
Should the result of the check-in be noted in any other way than by the
change of the status?
* addressed review comments
* implement unit test for manual checkin
* fix style-issues
* Slight layout change
* Log who did the manual check-in
* Improve unit test to check the result of the action
* add checkin status page
add dashboard widget
add checkin page under orders
* modify checkin logic
added new fields in checkin page
added filter items
* add tests for checkins & minor improvement
* support addin_product & noadm setting logic
* remove name ordering check test case
