added beets genre whitelist

.config/beets/whitelist.yaml

@@ -0,0 +1,25 @@
+acid
+alternative
+ambient
+classic
+dance
+electro
+folk
+goa
+hard trance
+heavy metal
+hip hop
+hörspiel
+house
+indie
+jazz
+metal
+pop
+punk
+rap
+schlager
+soul
+swing
+techno
+trance
+