Add ability for individual posts to set reading time

_posts/2013-10-27-set-time.md

@@ -0,0 +1,18 @@
+---
+layout: post
+title: Set Reading Time
+description: "How to set the amount of time."
+tags: [sample post]
+time: 5 minutes
+categories: [intro]
+---
+
+
+## Code Snippets
+
+You can override the default reading time calculation by manually setting it
+within a specific post.
+
+{% highlight yaml %}
+time: 5 minutes
+{% endhighlight %}

_templates/post

@@ -5,10 +5,11 @@ modified:
 categories: {{ dir }}
 description:
 tags: []
+time: XX minutes
 image:
   feature:
   credit:
   creditlink:
 comments:
 share:
----
+---

index.html

@@ -19,11 +19,16 @@
     <div class="entry-meta">
       <span class="entry-date date published updated"><time datetime="{{ post.date | date_to_xmlschema }}"><a href="{{ site.url }}{{ post.url }}">{{ post.date | date: "%B %d, %Y" }}</a></time></span><span class="author vcard"><span class="fn"><a href="{{ site.url }}/about/" title="About {{ site.owner.name }}">{{ site.owner.name }}</a></span></span>
       {% if site.reading_time %}
-      <span class="entry-reading-time">
-        <i class="fa fa-clock-o"></i>
-        {% assign readtime = post.content | strip_html | number_of_words | divided_by:site.words_per_minute %}
-        Reading time ~{% if readtime <= 1 %}1 minute{% else %}{{ readtime }} minutes{% endif %}
-      </span><!-- /.entry-reading-time -->
+        <span class="entry-reading-time">
+          <i class="fa fa-clock-o"></i>
+          {% assign readtime = post.content | strip_html | number_of_words | divided_by:site.words_per_minute %}
+          Reading time ~
+          {% if post.time %}{{ post.time }}
+          {% elsif readtime <= 1 %}1 minute
+          {% else %}{{ readtime }} minutes
+          {% endif %}
+        </span>
+        <!-- /.entry-reading-time -->
       {% endif %}
     </div><!-- /.entry-meta -->
     {% if post.link %}