new edit_profile string based qrcode

qrcode.go

 	resp, err := postJSON(j, u)
 	if err != nil {
 		return
-	}
+	} //edit_profile gQFR8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyZnNRMVJmZ3VjU2gxMDAwME0wN28AAgTQaSVZAwQAAAAA
 	//{"ticket":"gQEm8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyS19UblE5Z3VjU2gxMDAwME0wM04AAgRMYh1ZAwQAAAAA","url":"http:\/\/weixin.qq.com\/q\/02K_TnQ9gucSh10000M03N"}
 	//image: https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQEm8DwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyS19UblE5Z3VjU2gxMDAwME0wM04AAgRMYh1ZAwQAAAAA
 	err = json.Unmarshal([]byte(resp), &result)