Refactor the charts post. Fix #26

Second attempt at this one.

	modified:   _includes/disqus_comments.html
	modified:   _includes/scripts.html
	new file:   assets/js/script.js
  Extracted the raw JS scripts into a new "script.js" file for easier
  maintenance. Left the Google Analytics portion as is for now.

	deleted:    _posts/2013-10-28-72-talk-proposals-in-total.html
	new file:   _posts/2013-10-28-72-talk-proposals-in-total.md
  After the Jekyll update to ~> 1.2.0 version, the templating is more
  easier and predictable. When using markdown, we can insert YAML
  frontmatter.

	modified:   assets/css/style.css
	modified:   assets/less/style.less
  Remove inline styles for the chart divs and place them into the css
  file.