Added options to limit output stats, also added stdev()
Added options to limit output stats, also added stdev()

doganmeh/csvkit,nriyer/csvkit,onyxfish/csvkit,Tabea-K/csvkit,bradparks/csvkit__query_join_filter_CSV_cli,arowla/csvkit,elcritch/csvkit,haginara/csvkit,KarrieK/csvkit,aequitas/csvkit,Jobava/csvkit,themiurgo/csvkit,metasoarous/csvkit,wjr1985/csvkit,cypreess/csvkit,matterker/csvkit,dannguyen/csvkit,barentsen/csvkit,kyeoh/csvkit,unpingco/csvkit,archaeogeek/csvkit,moradology/csvkit,wireservice/csvkit,reubano/csvkit,snuggles08/csvkit,bmispelon/csvkit,gepuro/csvkit,tlevine/csvkit,jpalvarezf/csvkit