Add notes on what needs done, where, for new Release attribute.

layouts/posts/single.html

@@ -108,6 +108,8 @@
         <img style="display: inline-block; vertical-align: middle; margin-right: 4px;"
             src="/feathericons/16px-a9a9b3/calendar.svg" alt="Published Date:" title="Published Date"
         >
+        
+        <!-- tbd: if Release is not null and later than Date, use it for Date. --> 
         {{ if .Site.Params.dateformNumTime }}
           {{ dateFormat .Site.Params.dateformNumTime .Date.Local }}
         {{ else }}