Organize summary template files

Also a small CSS patch to fix margin around post-title

layouts/authors/summary.html

@@ -0,0 +1,16 @@
+<div class="author">
+    <h2 class="author-name">
+        <a href="{{ .Permalink }}">{{ .Title | markdownify }}</a>
+        {{ if .Draft }}{{ partial "icon.html" "write" }}{{ end }}
+    </h2>
+
+    {{ partial "post-metadata/author.html" . }}
+
+    <div class="author-description">
+        {{ partial "description-or-summary.html" . }}
+    </div>
+
+    <div class="readmore">
+        <a href="{{ .Permalink }}">{{ i18n "read_more" }} &rarr;</a>
+    </div>
+</div>