Added Article#comments

lib/shopify_api.rb

@@ -352,6 +352,10 @@ module ShopifyAPI
   
   class Article < Base
     self.prefix = "/admin/blogs/:blog_id/"
+    
+    def comments
+      Comment.find(:all, :param => { :article_id => id })
+    end
   end
   
   class Metafield < Base