Add whitelist
Adds an option in the BlacklistActivity to interpret the list as a whitelist: that is, anyone who is not on the list is rejected. Implements #1.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Adds an option in the BlacklistActivity to interpret the list as a whitelist: that is, anyone who is not on the list is rejected. Implements #1.