Add draft of client library header
Add draft of client library header

jimpelton/mingle-logcabin,jimpelton/mingle-logcabin,nhardt/logcabin,logcabin/logcabin,tempbottle/logcabin,chaozh/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,TigerZhang/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,jimpelton/mingle-logcabin,nhardt/logcabin,tempbottle/logcabin,dankenigsberg/logcabin,gaoning777/logcabin,TigerZhang/logcabin,logcabin/logcabin,logcabin/logcabin,logcabin/logcabin,tempbottle/logcabin,gaoning777/logcabin,chaozh/logcabin,tempbottle/logcabin,nhardt/logcabin,gaoning777/logcabin,chaozh/logcabin,nhardt/logcabin,chaozh/logcabin,gaoning777/logcabin