Initial release version of templates

The templates in this commit are now in RC form.
Everything but the article templates are ready.

Changes include ( no limited to ):
- Update stylesheet
- Add method in app.js to handle images in documents
- Create _author_item.html to display author information and vcard
- Update _disqus.html to fit in with site style
- Update _page_footer.html for translation support
- Add _pagination.html for pagination support
- Add _translations.html for translation listing support
- Minor updates to archives.html, tags.html
- Update base.html to have more flexibility
- Update authors.html and author.html to display information
- Update category.html and categories.html to use the _list_item.html
- Update page translation support + misc
- Update tag.html to use _list_item.html

templates/authors.html

@@ -1,4 +1,11 @@
 {% extends 'base.html' %}
-  
+{% block content_title %}<a href="{{ SITEURL }}/{{ page_name }}.html" rel="bookmark">Authors</a>{% endblock %}
 {% block content %}
-{% endblock %}
+{% if authors %}
+<ul class="item-list">
+  {% for author, articles  in authors %}
+  {% include '_author_item.html' %}
+  {% endfor %}
+</ul>
+{% endif %}
+{% endblock %}