Implement draft system

_includes/layouts/post.njk

@@ -10,7 +10,7 @@ layout: layouts/base.njk
 					<a href="{{ tagUrl }}">#{{ tag }}&nbsp;</a>
 				{%- endfor %}
 			</p>
-			<h1>{{ title | markdownify | safe}}</h1>
+			<h1>{% if draft %}<mark class="draftMarker">DRAFT:</mark> {% endif %}{{ title | markdownify | safe}}</h1>
 			{% if synopsis %}
 				<p class="post-synopsis">
 					{{ synopsis | markdownify | safe}}

_includes/postslist.njk

@@ -8,7 +8,7 @@
 				<a href="{{ post.url }}" class="postlist-link">
 			{% endif %}
 					<h3>
-						{% if post.data.title %}{{ post.data.title | markdownify | safe }}{% else %}?{% endif %}
+						{% if post.data.draft %}<mark class="draftMarker">DRAFT:</mark> {% endif %}{% if post.data.title %}{{ post.data.title | markdownify | safe }}{% else %}?{% endif %}
 					</h3>
 				{% if not postListTypeMicroblog %}
 				</a>