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/tag.html

@@ -1,3 +1,3 @@
 {% extends 'base.html' %}
-{% block title %}{{ (super) }} - {{ tag.name }} {% endblock %}
-{% block content_title %}{{ tag.name }}{% endblock %}  
+{% block title %}{{ super() }} - {{ tag }} {% endblock %}
+{% block content_title %}<a href="{{ SITEURL }}/{{ tag.url }}" rel="bookmark">{{ tag }}</a>{% endblock %}