Update the logging levels, change to NSLOG across the board,
and ensure that we use the `dukky` category now added for us.
Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>
This paves the way for EventTarget and its associated event listener support.
In particular it ensures the generic event handling we do supports the
semantics of the addEventListener() and removeEventListener() managed lists of
callbacks.
