log

type Entry struct {
	Time       time.Time   `json:"time"`
	Level      level       `json:"level"`
	Message    string      `json:"message"`
	Data       interface{} `json:"data"`
	StackTrace string      `json:"stackTrace"`
}

type Log interface {
	Debug(format string, args ...interface{})
	Info(format string, args ...interface{})
	Warning(format string, args ...interface{})
	Stats(data interface{})
	ErrorOn(err interface{})
	FatalOn(err interface{})
}