Update logic for Back Home, and also add metadata to homepage

layouts/_default/list.html

@@ -1,4 +1,5 @@
 {{ define "main" }}
+{{ partial "head.html" }}
 <h1>{{ .Title }}</h1>
 {{ range .Pages.ByLastmod.Reverse }}
 <p>

layouts/index.html

@@ -12,6 +12,7 @@
       {{ range where .Site.RegularPages "Section" "in" .Site.MainSections }}
         <section class="articles">
 		<h3><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h3>
+		{{ partial "metadata.html" . }} 
 		<p class="summary">{{ .Summary }}</p>
 	</section>
       {{ end }}

layouts/partials/header.html

@@ -12,7 +12,7 @@ config change. -->
   	{{- end }}
 </nav>
 <h1>{{ $.Site.Title }}</h1>
-{{ else if .IsPage }}
+{{ else }}
 <a href="/">Go Home</a>
 </nav>
 <p>{{ $.Site.Params.subtitle }}</p>