Rename instead of removing MPTT parent field to enable legacy migrations
Rename instead of removing MPTT parent field to enable legacy migrations

Instead of removing the legacy 'parent' field previously provided by
MPTT, rename it to our own field 'derived_from'. This avoid data loss
and will make it possible to migrate projects using the legacy EventKit
codebase.

ic-labs/icekit-events,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/icekit-events,ic-labs/icekit-events