Fix maildir adapter bug in relading subscribers in the publisher
Ensure a topic is aware of changes in subscribers

No tests existed that ensured that when two different handles to the same
topic existed, if a subscriber was added to one instance, it would show up
in the other instance. This is now fixed.

This exposed an error in the maildir adapter which would not reload the 
list of subscribers if they changed.

This exposed an error in the redid adapter which would not cleanup subscribers if the topic was deleted.
update history
convert to fixme structure
clean up a maildir -w warning until it is fixed upstream
Ensure queue and topic are removed on test completion
Update kestrel queue with appropriate destroy calls
Merge branch 'fixme'