* datasync: add immediate parameter to enqueue_order
* interactive argument for order_placed signal
The ``interactive`` argument specifies whether the order was
placed interactively, by a customer (as opposed to via a bulk
import or the REST API).
* use bulk=True instead of interactive=False to mark bulk imports
* Generalize import process from orders to more models
* Add voucher import
* Model import: Guess assignments of based on column headers
* Fix lock_seats being pointless
* Update docs
* Update doc/development/api/import.rst
Co-authored-by: Richard Schreiber <schreiber@rami.io>
* Update src/pretix/base/modelimport_vouchers.py
Co-authored-by: Richard Schreiber <schreiber@rami.io>
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Co-authored-by: Richard Schreiber <schreiber@rami.io>