Add all categories to post render context

- Convert post date/time to web log timezone

src/MyWebLog/themes/daniel-j-summers/layout.liquid

@@ -11,7 +11,7 @@
     <link rel="preload" href="/themes/{{ web_log.theme_path }}/style.css" as="style">
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
     <link rel="stylesheet" href="/themes/{{ web_log.theme_path }}/style.css">
-    {% if is_home -%}
+    {%- if is_home %}
       <link rel="alternate" type="application/rss+xml" title="{{ web_log.name | escape }}" href="/feed.xml">
     {%- endif %}
     <script src="/themes/{{ web_log.theme_path }}/djs.js"></script>
@@ -21,9 +21,9 @@
       <p><a class="nav-home" href="/">{{ web_log.name }}</a></p>
       {%- if web_log.subtitle %}<p>{{ web_log.subtitle.value }}</p>{% endif -%}
       <p class="nav-spacer"></p>
-      {% for page in page_list %}
+      {%- for page in page_list %}
         <p class="desktop"><a href="/{{ page.permalink }}">{{ page.title }}</a></p>
-      {% endfor %}
+      {%- endfor %}
       <p class="desktop">
         <a href="https://devotions.summershome.org" target="_blank" rel="noopener">A Word from the Word</a>
       </p>
@@ -31,9 +31,9 @@
     </nav>
     {{ content }}
     <footer class="part-1" id="links">
-      {% for page in page_list %}
+      {%- for page in page_list %}
         <p class="mobile"><a href="{{ page.permalink }}">{{ page.title }}</a></p>
-      {% endfor %}
+      {%- endfor %}
       <p class="mobile">
         <a href="https://devotions.summershome.org" target="_blank" rel="noopener">A Word from the Word</a>
       </p>