WIP Views UI: watchdog basic integration.
Provide a default bulk watchdog view.
Provide a default Sink view.
Bind the Views page displays into a central reports page.
New write subscriber
Taken FGM's comments in account
Added unit tests
Merge pull request #2 from bpresles/dblog-views

New WriteSubscriber to catch sets and clears.
Refactor shared event emission code in subscribers to EventSourceSubscriber.
Merge pull request #3 from FGM/dblog-views

Dblog views