Make writer available to tagger script as %writer%

picard/mbxml.py

@@ -27,6 +27,7 @@ AMAZON_ASIN_URL_REGEX = re.compile(r'^http://(?:www.)?(.*?)(?:\:[0-9]+)?/.*/([0-
 
 _artist_rel_types = {
     "composer": "composer",
+    "writer": "writer",
     "conductor": "conductor",
     "chorus master": "conductor",
     "performing orchestra": "performer:orchestra",

picard/util/tags.py

@@ -41,6 +41,7 @@ tag_names = {
     'copyright': N_('Copyright'),
     'license': N_('License'),
     'composer': N_('Composer'),
+    'writer': N_('Writer'),
     'conductor': N_('Conductor'),
     'lyricist': N_('Lyricist'),
     'arranger': N_('Arranger'),