KvServer code in example folder can not build succ

[eyun221]

kv_server.cc:156:31: error: ‘class floyd::Floyd’ has no member named ‘DirtyWrite’
Status result = floyd_->DirtyWrite(request.key(), request.value());

kv_server.cc:139:47: error: no matching function for call to ‘floyd::Floyd::GetServerStatus(std::string&)’
bool ret = floyd_->GetServerStatus(value);

lots of bug exists