Merge pull request #23 from mathiasbynens/html-time

Use <time> where applicable

_includes/postslist.njk

@@ -2,7 +2,7 @@
 {% for post in postslist | reverse %}
 	<li class="postlist-item{% if post.url == url %} postlist-item-active{% endif %}">
 		<a href="{{ post.url | url }}" class="postlist-link">{% if post.data.title %}{{ post.data.title }}{% else %}<code>{{ post.url }}</code>{% endif %}</a>
-		<span class="postlist-date">{{ post.date | readableDate }}</span>
+		<time class="postlist-date" datetime="{{ post.date | htmlDateString }}">{{ post.date | readableDate }}</time>
 		{% for tag in post.data.tags %}
 			{%- if tag != "post" -%}
 			{% set tagUrl %}/tags/{{ tag }}/{% endset %}