include author and Posted prefix for single.html

layouts/_default/single.html

@@ -3,7 +3,13 @@
 
   {{ $dateMachine := .Date | time.Format "2006-01-02T15:04:05-07:00" }}
   {{ $dateHuman := .Date | time.Format "Mon | Jan 2, 2006" }}
-  <time datetime="{{ $dateMachine }}">{{ $dateHuman }}</time>
+
+  {{ with .Params.authors }}
+    {{ $author := (index . 0) }}
+    <h4>Author: <a href={{ printf "/%s/%s" "authors" (urlize $author) }}>{{ $author }}</a></h4>
+  {{ end }}
+
+  <h4>Posted: <time datetime="{{ $dateMachine }}">{{ $dateHuman }}</time></h4>
 
   {{ .Content }}
   {{ partial "terms.html" (dict "taxonomy" "tags" "page" .) }}