modify tornado requires to 4.0 stable
modify tornado requires to 4.0 stable

adsharma/flattools,importcjj/thriftpy,OctavianLee/thriftpy,maralla/thriftpy,OctavianLee/thriftpy,dan-blanchard/thriftpy,duydb2/thriftpy,halfcrazy/thriftpy,duydb2/thriftpy,maralla/thriftpy,dan-blanchard/thriftpy,itnihao/thriftpy,spladug/thriftpy,adsharma/flattools,adsharma/flattools,maralla/thriftpy,OctavianLee/thriftpy,keitheis/thriftpy,importcjj/thriftpy,mariusvniekerk/thriftpy,mariusvniekerk/thriftpy,misakwa/thriftpy,halfcrazy/thriftpy,eleme/thriftpy,itnihao/thriftpy,keitheis/thriftpy,itnihao/thriftpy,misakwa/thriftpy,duydb2/thriftpy,spladug/thriftpy,misakwa/thriftpy,eleme/thriftpy,mariusvniekerk/thriftpy