Add section.html template

So we can see articles in sections like

* $BaseURL/news
* $BaseURL/hiring

May be we can add a News navigation link

themes/briar/layouts/_default/section.html

+{{ define "main" }}
+ <div id="container">
+      <div id="content">
+      <h1>{{ with .Title }} {{ . }} {{ else }} {{ .Site.Title }} {{ end }}</h1>
+      {{ range first 10 .Pages.ByDate.Reverse }}
+      <h3 itemprop="headline" class="blog-post-title">
+      <a href="{{.Permalink}}">{{.Title}}</a>
+      </h3>
+<p class="blog-post-meta">{{.Date.Format "2006-01-02"}}
+      {{ if (isset .Params "author") }}
+      by {{ markdownify .Params.author }}
+      {{ end }}
+      </p>
+      {{ end }}
+      {{ .Content }}
+      </div> <!-- content -->
+    </div> <!-- container -->
+{{ end }}