add note about licenses to README
add note about licenses to README
Grollus/data,M4573R/data,jnarhan/data,dbarenas/data,Derek-Cartwright-Jr/data,willettk/538data,rhiever/data,alf10087/data,mariebradshaw/data,ecatkins/data,pganapathy01/data,xavierwu/data,JammiNRao/data,jjrennie/data,emanderson86/data,raincoatrun/data,dbarenas/data,rhiever/data,Grollus/data,M4573R/data,gosox5555/data,raincoatrun/data,4everer/data,SGShuman/data,pmk2109/data,umby/data,emanderson86/data,filip-z/data,FreeSchoolHackers/data,mikedshadow/data,mikedshadow/data,filip-z/data,linearregression/data,pmk2109/data,hurricane42/data,rishikksh20/data,eamoncaddigan/fivethirthyeight-data,developer-aj/data,SGShuman/data,quevedin/data-1,FreeSchoolHackers/data,developer-aj/data,gosox5555/data,rishikksh20/data,jmmateo/test,eamoncaddigan/fivethirthyeight-data,SteveM49/data,xavierwu/data,umby/data,linearregression/data,SteveM49/data,crockettcobb/data,ajackwin/data,JammiNRao/data,pganapathy01/data,jmwoloso/data,collbb/data,collbb/data,Derek-Cartwright-Jr/data,ecatkins/data,hurricane42/data,4everer/data,ajackwin/data,jmmateo/test,alf10087/data,mariebradshaw/data,jjrennie/data,willettk/538data,quevedin/data-1,jmwoloso/data,crockettcobb/data,jnarhan/data