changes

app/logical/post_sets/base.rb

@@ -1,13 +1,20 @@
 module PostSets
   class Base
     def has_wiki?
-      false
+      is_single_tag?
     end
     
     def wiki_page
       nil
     end
     
+    def has_artist?
+      is_single_tag?
+    end
+    
+    def artist
+    end
+    
     def presenter
       @presenter ||= PostSetPresenter.new(self)
     end
@@ -16,10 +23,6 @@ module PostSets
       false
     end
     
-    def tag
-      tag_string
-    end
-    
     def arbitrary_sql_order_clause(ids, table_name)
       if ids.empty?
         return "#{table_name}.id desc"