Implementing the previous commit

In main.go we are setting the default image path.
and whenever we don't find the image through lastfm we pointhepath to
default image in render.go

render.go

@@ -86,6 +86,8 @@ func getImagePath(path string) string {
 				if err == nil {
 					NOTIFICATION_SERVER.Send("Image From LastFM")
 					extractedImage = downloadedImage
+				} else {
+					cache.PointToDefault(a[0]["artist"], a[0]["album"])
 				}
 			}
 		}