Added Code Coverage to README
Added Code Coverage to README

AFNetworking/AFNetworking,mhpavl/AFNetworking,purdyk/AFNetworking,yunzhongyoulong/AFNetworking,Juraldinio/AFNetworking,AFNetworking/AFNetworking,maximmalygin/AFNetworking,Farteen/AFNetworking,wymsee/AFNetworking,Yincongxiao/AFNetworking,yuewenyan/AFNetworking,opentable/AFNetworking,0xced/AFNetworking,mhpavl/AFNetworking,p4checo/AFNetworking,0xced/AFNetworking,Automatic/AFNetworking,guogh/AFNetworking,rocklive/AFNetworking,purdyk/AFNetworking,Kjuly/AFNetworking,E-B-Smith/AFNetworking,Kjuly/AFNetworking,wprice/AFNetworking,zhang-yawei/AFNetworking,knutigro/AFNetworking,AFNetworking/AFNetworking,zhang-yawei/AFNetworking,E-B-Smith/AFNetworking,knutigro/AFNetworking,Kjuly/AFNetworking,renaudbuisine/MF_AFNetworking,yunzhongyoulong/AFNetworking,yuewenyan/AFNetworking,RbBtSn0w/AFNetworking,guogh/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks,nonoBruce/AFNetworking,Yincongxiao/AFNetworking,renaudbuisine/MF_AFNetworking,wprice/AFNetworking,nonoBruce/AFNetworking,iKorich/AFNetworking,wymsee/AFNetworking,smule/AFNetworking,adozenlines/AFNetworking,Automatic/AFNetworking,E-B-Smith/AFNetworking,adozenlines/AFNetworking,nonoBruce/AFNetworking,maximmalygin/AFNetworking,kiurentu/AFNetworking,Farteen/AFNetworking,FelixYin66/AFNetworking,SecuraSeal/AFNetworking,RbBtSn0w/AFNetworking,Fitbit/AFNetworking,Juraldinio/AFNetworking,houweilei/AFNetworking,Fitbit/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks,wangxiaoxiang/AFNetworking,houweilei/AFNetworking,sunkehappy/AFNetworking,kiurentu/AFNetworking,DevSonw/AFNetworking,DevSonw/AFNetworking,SecuraSeal/AFNetworking,opentable/AFNetworking,p4checo/AFNetworking,opentable/AFNetworking,rocklive/AFNetworking,smule/AFNetworking