##introduction
- a small logger support stdout ,file record, and may network later
- written by C++11
##usage ###logging
#include "llog.h"
LOG(INFO) << "lllog";
###configuration
- default set to STDOUT, you can switch to STDERR by set
ins::log_to_stderr = true;
- support dup log to file, and set log level
auto &config = ins::Configuration::GetInstance();
config.Configure(ins::Configuration::LOG_FILE, "/tmp/test.log");
config.Configure(ins::Configuration::LOG_LEVEL, "ERROR");