Added section about facets stats in README
Added section about facets stats in README

johan--/searchkick,giangnguyennet/searchkick,pluton-house/searchkick,Fablic/searchkick,richardking/searchkick,yakovenkodenis/searchkick,st0012/searchkick,jprosevear/searchkick,incorvia/searchkick,DmitryKK/searchkick,klebervirgilio/searchkick,nviennot/searchkick,spanner/searchkick,savayg/searchkick,meetrajesh/searchkick,yardclub/searchkick,incorvia/searchkick,yakovenkodenis/searchkick,kevin-klein/searchkick,johan--/searchkick,savayg/searchkick,elguapo1611/searchkick,bukalapak/searchkick,yardclub/searchkick,jaredcwhite/searchkick,karthik-mallavarapu/searchkick,elguapo1611/searchkick,mikelkew/searchkick,bodiam/searchkick,kevin-klein/searchkick,klebervirgilio/searchkick,ankane/searchkick,Ribeiro/searchkick,mehulkar/searchkick,jaredcwhite/searchkick,Xtinct/searchkick,mehulkar/searchkick,Fablic/searchkick,edatrix/searchkick,mikelkew/searchkick,bodiam/searchkick,Altareq/searchkick,Ribeiro/searchkick,jprosevear/searchkick,Pathgather/searchkick,bukalapak/searchkick,meetrajesh/searchkick,seuros/searchkick,nviennot/searchkick,moneyadviceservice/searchkick,Altareq/searchkick,Xtinct/searchkick,instacart/searchkick,richardking/searchkick,st0012/searchkick,moneyadviceservice/searchkick,joe1chen/searchkick,seuros/searchkick,pluton-house/searchkick,joe1chen/searchkick,instacart/searchkick,DmitryKK/searchkick,edatrix/searchkick,spanner/searchkick,karthik-mallavarapu/searchkick,giangnguyennet/searchkick