Fixed release, 0.3.9.
The merge of the last two changes didn't go so cleanly, turns out that
the change which removes Mouse kills the accessor ``_hangup''. This
changeset will require a release to ``AnyEvent::Blackboard`` as well.
Added tests for (and fixed) ``watched'' method.
* The ``watched`` method was working completely incorrectly, this has been
* Added API tests for the following methods: