Add 'deployed' event when new entries are deployed.
Add 'deployed' event when new entries are deployed.

The event has information of both entries which have been deployed,
and which have not been, because they were either drafts or future
posts.  Listeners can be hooked up to do the needful, for deployed and
undeployed entries.

masayuko/nikola,okin/nikola,masayuko/nikola,masayuko/nikola,yamila-moreno/nikola,atiro/nikola,berezovskyi/nikola,x1101/nikola,xuhdev/nikola,berezovskyi/nikola,Proteus-tech/nikola,Proteus-tech/nikola,lucacerone/nikola,atiro/nikola,getnikola/nikola,okin/nikola,getnikola/nikola,xuhdev/nikola,wcmckee/nikola,getnikola/nikola,getnikola/nikola,jjconti/nikola,yamila-moreno/nikola,lucacerone/nikola,pluser/nikola,lucacerone/nikola,s2hc-johan/nikola,wcmckee/nikola,atiro/nikola,gwax/nikola,berezovskyi/nikola,immanetize/nikola,xuhdev/nikola,knowsuchagency/nikola,schettino72/nikola,gwax/nikola,pluser/nikola,pluser/nikola,TyberiusPrime/nikola,gwax/nikola,x1101/nikola,TyberiusPrime/nikola,techdragon/nikola,andredias/nikola,s2hc-johan/nikola,schettino72/nikola,Proteus-tech/nikola,JohnTroony/nikola,andredias/nikola,andredias/nikola,JohnTroony/nikola,yamila-moreno/nikola,techdragon/nikola,jjconti/nikola,TyberiusPrime/nikola,okin/nikola,knowsuchagency/nikola,immanetize/nikola,okin/nikola,wcmckee/nikola,jjconti/nikola,immanetize/nikola,techdragon/nikola,Proteus-tech/nikola,knowsuchagency/nikola,xuhdev/nikola,JohnTroony/nikola,x1101/nikola,schettino72/nikola,s2hc-johan/nikola