Add listing_macros template code to display 'From Current Issue' or
'From Issue XX'.
Add viewlet to display Issue subtitle, and Diazo rules to include
it (like Issue 69, Spring 2014).
Add title to folder_article_listing template though it will only
be used on Issues.
Fix style on topic headers.
Make folder_article_listing an available display option for Issues.
Fix article listing query for ATTopics