func Fatalf(format string, v ...interface{}) {
	Logf(format, v...)
	os.Exit(1)
}
Fatalf logs with Logf and then exits with os.Exit(1)
package log
import (
	"os"
	"github.com/go-log/log"
	golog "github.com/go-log/log/log"
)
var (
	logger log.Logger = golog.New()
)
func Log(v ...interface{}) {
	logger.Log(v...)
}
func Logf(format string, v ...interface{}) {
	logger.Logf(format, v...)
}
func Fatal(v ...interface{}) {
	Log(v...)
	os.Exit(1)
}