OpenTreeMap/OTM2 — pull request #1782 by RickMohr (2014-11-07 16:11:59+00:00)
Title: Celery tasks now take ID's, not objects

Changes to `tasks.py`:
* In all tasks, pass `import_type, import_event_id` instead of `ie`
* Change function order to top-down
* Add helpers to retrieve import event from type and ID

Also:
* Change task-creation calls to use the new signatures
* Remove unused `views.process_commit`