You can relay a notification with a different name
Version bump to 0.2.0
Regenerate gemspec for version 0.2.0
[SHIT FIRST DRAFT] You can add listeners that are notified exactly as observers are
You cannot add the same listener more than once
You can delete listeners which stops notifications
It fails to delete listener if it was never listening in the first place
When listening, you get the event name and the args, just like ordinary notifications
It fails to add a listener that does not respond to the right message
Refactor: sugar
Refactor: extracted method
it can be queried for the number of listeners