[#125] PrimaryHost now publishes NCMDs and DCMDs
Fixed bug with FB_EdgeTopicProvider.SetNCMDTopic
Note: currently only birthed metrics can be xCMDed. A generic xCMD is needed to, for example, send a Node Rebirth to a node which we have not yet received its birth certificate.
[#129] refactored IAuthor => IMessageSource
fixed IMessageSource method names to have the interface owner as the Subject of the verb
split informPublishDoneOrError() into two properties, PublisherDone and PublisherError