Added new CLI args to README.
Added new CLI args to README.

Nitro/sidecar,Nitro/sidecar,newrelic/sidecar,Nitro/sidecar,benoahriz/sidecar,benoahriz/sidecar,relistan/sidecar,relistan/sidecar,newrelic/sidecar,Nitro/sidecar,newrelic/sidecar,relistan/sidecar,benoahriz/sidecar,newrelic/sidecar,benoahriz/sidecar