add newrelic back
add newrelic to grape-goliath
use fiber_pool
Revert "use fiber_pool"

This reverts commit 916c8277b8047c2e939cd1436533d085957b9b81.
remove nginx cookbook
add NEW_RELIC_APP_NAME env
update newrelic.yml
remove ActiveRecord::ConnectionAdapters::ConnectionManagement middleware
try rainbows threads
remove rainbows config
add rainbows config
copy leaderboard-sinatra-rainbows and leaderbaord-grape-rainbows to use AR ConnectionManagement middleware
update README
database pool size matches rainbows worker connections size
update deployment for rainbows