func StdErrAppender() send.Sender {
	s, _ := send.NewStreamLogger("", os.Stderr, send.LevelInfo{Default: level.Debug, Threshold: level.Debug})
	return s
}
StdErrAppender returns a configured stream logger Sender instance
that writes messages to standard error.
package slogger
import (
	"bytes"
	"os"
	"strings"
	"github.com/mongodb/grip/level"
	"github.com/mongodb/grip/send"
)
type Appender interface {
	Append(log *Log) error
}
func StdOutAppender() send.Sender {
	s, _ := send.NewStreamLogger("", os.Stdout, send.LevelInfo{Default: level.Debug, Threshold: level.Debug})
	return s
}