Add proper disqus identifier comment count links

Fixes #277
Fix Disqus over https.

  Forcing http:// as protocol will make Disqus fail when server over
  https for security reasons.
Merge pull request #1384 from kAworu/fix-disqus-over-https

Fix Disqus over https.
Merge branch 'master' of git://github.com/imathis/octopress

Conflicts:
	.themes/classic/source/_includes/article.html