changed genre scanning to parse multiple genres, updated db to accommodate.

backend/database/sql/sqlcgen/models.go

@@ -45,6 +45,11 @@ type FileType struct {
 	Extension string
 }
 
+type Genre struct {
+	ID   int64
+	Name string
+}
+
 type PlayerState struct {
 	ID                  int64
 	Volume              int64
@@ -95,6 +100,12 @@ type Recording struct {
 	Comment        sql.NullString
 }
 
+type RecordingGenre struct {
+	ID          int64
+	RecordingID int64
+	GenreID     int64
+}
+
 type ReleaseGroup struct {
 	ID                  int64
 	Name                string