Remove useless generated comments.
Remove hardcoded 'bigwig_pubsubhub:notify' and add 'amqp_subscriber:start_link/2' accept custom event handler - module (with notify(Evt)) of function with one arg. Note: 'amqp_subscriber:start_link/1' uses by default bigwig.
Make notification in a buffered way.
Enforce add 'node' meta to jsoned event.