Update to Rendering Routine.

Following changes have been made:

     1. The OpenImage() function now checks if the image returned by the
	mp3 and flac parsers is the default image if it is true then it
	will query the lastfm api for cover image if no error is
	received then the path to that downloaded image is passed else
	the path is unchanged ( that is it will be the default image )

render.go

@@ -43,7 +43,18 @@ func openImage(path string, c chan string) {
 	fw, fh := getFontWidth()
 	var im *ueberzug.Image
 	if path != "stop" {
-		img2, _ := getImg(extractImageFromFile(path))
+		absPath := viper.GetString("MUSIC_DIRECTORY") + path
+		extractedImage := extractImageFromFile(absPath)
+		if extractedImage == viper.GetString("DEFAULT_IMAGE_PATH") && viper.GetString("GET_COVER_ART_FROM_LAST_FM") == "TRUE" {
+			a, err := CONN.ListInfo(path)
+			if err == nil && len(a) != 0 {
+				downloadedImage, err := getImageFromLastFM(a[0]["artist"], a[0]["album"])
+				if err == nil {
+					extractedImage = downloadedImage
+				}
+			}
+		}
+		img2, _ := getImg(extractedImage)
 		im, _ = ueberzug.NewImage(img2, int(float32(IMG_X)*fw)+viper.GetInt("ADDITIONAL_PADDING_X"), int(float32(IMG_Y)*fh)+viper.GetInt("ADDITIONAL_PADDING_Y"))
 	}
 	d := <-c