add memprint helper to show hex bytes in memory
add memprint helper to show hex bytes in memory

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