neues Autor*innensystem integriert

lieder/vorlage_light/vorlage_light.ly

@@ -5,9 +5,12 @@
 HEADER = \bookpart {
   \header {
     title = "Titel"
-    songId = "a-song-id"
-    categories = ""
-    songinfo = "wasauchimmer"
+    alttitle = "Liedanfang"
+    authors = #'(
+      ("" ))
+    year_text = ""
+    year_melody = ""
+    infotext = ""
   }
 }