Added a nginx-pre-reload hook which updates the upstream backends
Added post-delete script which stops the upstart instance
Reverted back to default dokku deploy
Moved ps_deploy into pre-deploy hook
Properly update the nginx upstreams from dokku ps
Removed uneccessary sleep and silence upstart script
Removed some logs
Added post-deploy script which kills the original deploy
Silence some logs
Use dokku deploy after ps:scale