Fixed #1, bug related to responsive bootstrap
Fix some coding style issues related to docstring and comments.

See
http://www.gnu.org/software/emacs/manual/html_node/elisp/Documentation-Tips.html
for detailed coding style guide.
fix a bug related to :body-only of org-export-as-html

To support #3, we set :body-only from t to nil, and since the auto
generated index.org of posts and wikis didn't provide a title before,
org-mode would treat the first org link as title, which makes the first
link unavailable.
Implement #17, some minor theme and page improvement

- Page title css style refinement
- Add categories, rss subscribe links
- Post->Posts, Wiki->Wikis
- Pull right "about" and "subscribe" links in navbar
Implement #3, experimentally seperate toc to a span4 sidebar

TODO:
- import less css support for better TOC style customization, the
  current TOC style is far from good enough
- sidebar usage and design need more design