Changed the help text slightly.
Renamed a fiel to reflect functionality. Added aliases.
Added alias to Mail model, and using that value to get a proper lookup value.
Added announcing of unsubscribed list entries to dotkoms channel.
Added alias handling to command handling.
Changed which value subscriptions print when announcing.
Replaced the BiMap with a regular hashmap and consequently the way reversing is done.
Added more tests.
Added help triggers for mail.
Merge.