JPN translation of latest post, most structural pages

[ghost]

• Uses /jpn as root of JPN translated pages, and jpn as language category.
• Translated includes and layouts have 'jpn' appended to their base filename, as do posts.

[ghost]

@jsakuda pagination by category will be supported just as soon as the maintainers pull jekyll/jekyll-paginate#11

[ghost]

Strange paginator behavior: this doesn't work when placed in /ja/index.html but will work when placed in /index.html.

 {% for post in paginator.posts %}
      {% if post.lang contains "ja" %}
      {% include post.html %}
      {% endif %}
  {% endfor %}

[ghost]

@jsakuda jekyll/jekyll-paginate#11 means that categories can be used for pagination now. What do you think?