Add _drafts folder
Draft: Sharing External Hard Drive with Raspberry Pi
Draft: tmux quick start
Add language options to html

Add default "en" language to the whole site while allowing per-page
override for posts in other languages as well.  Just add the following
to the post/page front matter:

    lang: {en | pt | fr | es}
Add bootstrap v3.0.3
Use bootstrap v3.0.3

Port the blog template to make use of bootstrap v3.0.3 for a better
reading experience in mobile devices.  Minor changes in template colors.
Fix typo and resize columns on vim tips
Improve tmux quick start