title: Total number of posts?
body: <p>I'm trying to figure out how to display the total number of posts in a category (or all together). I envision something like below, but can't quite figure it out. Did I miss something from the docs?</p>
  
  <pre><code>{% for post in site.categories.CAT %}
      ...do some counting
  {% endfor %}
  
  posts: {% number_of_posts %}
  
  {% for post in site.categories.CAT %}
      {{ post.title }}
  {% endfor %}
  </code></pre>