extracted different song book styles

styles.ly

@@ -1,16 +1,16 @@
-#(define book-style
-  (if (not (defined? 'book-style))
+#(define bookStyle
+  (if (not (defined? 'bookStyle))
       #f
-      book-style))
+      bookStyle))
 
-#(define song-style
-  (if (not (defined? 'song-style))
-      'börnel
-      song-style))
+#(define songStyle
+  (if (not (defined? 'songStyle))
+      (if (not (defined? 'defaultSongStyle)) 'börnel defaultSongStyle)
+      songStyle))
 
-#(if (not (boolean? book-style))
-         (set! song-style book-style))
+#(if (not (boolean? bookStyle))
+         (set! songStyle bookStyle))
 
 #(define (bock-style layout props)
   "Whether we have bockstyle or not"
-  (eq? song-style 'bock))
+  (eq? songStyle 'bock))