Added - Add `ISubscribe` interface, with methods to allow customisation of email contents. - Add `get_activities` method to `ISubscribe` interface, to allow custom filtering of the activities we send notifications for.
Fixed - Fix sending notifications for non-verified subscriptions.
1.0.1
Changed - Fix getting weekly notifications when you subscribe to an org or group, and one of their datasets changes, even if your scription is not configured to be weekly.