Workaround for bypassing PK checks
Workaround for bypassing PK checks

Django 1.8.4 and later check related fields have saved objects assigned
to them *before* pre_save is called. This means our neat little trick of
returning a MasterTranslation on pre_save will fail. So we'll set pk =
0, as 0 is an invalid ID for the datastore

Fixes issue #3

potatolondon/fluent-2.0,potatolondon/fluent-2.0