Move ToC divs to toc partial (#329)

Allows Overriding of ToC

layouts/_default/single.html

@@ -23,16 +23,7 @@
   {{- $isHidden := .Params.cover.hidden | default .Site.Params.cover.hiddenInSingle | default .Site.Params.cover.hidden}}
   {{- partial "cover.html" (dict "cxt" . "IsHome" false "isHidden" $isHidden) }}
   {{- if (.Param "ShowToc") }}
-  <div class="toc">
-    <details {{if (.Param "TocOpen") }} open{{ end }}>
-      <summary accesskey="c" title="(Alt + C)">
-        <div class="details">{{- i18n "toc" | default "Table of Contents" }}</div>
-      </summary>
-      <div class="inner">
-        {{- partial "toc.html" . }}
-      </div>
-    </details>
-  </div>
+  {{- partial "toc.html" . }}
   {{- end }}
   <div class="post-content">
     {{- partial "anchored_headings.html" .Content -}}