Display show/episode which image was unable to download

```
2015-08-04 03:54:32 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images/thumbnails, skipping
2015-08-04 03:54:31 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images, skipping
2015-08-03 03:48:52 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images/thumbnails, skipping
2015-08-03 03:48:51 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images, skipping
2015-08-02 03:50:08 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images/thumbnails, skipping
2015-08-02 03:50:07 WARNING  SHOWQUEUE-REFRESH :: Unable to retrieve image to save in /home/osmc/SickRage/cache/images, skipping
```