Removed unused images.
Removed addCodeLineNumbers function from octopress.js.

Since there were no gist-highlight divs,it didn't do anything.
Remove Flash video fallback.

I don't plan on hosting videos from a GitHub repo.
Remove iOS scaling bug fix.

It has been fixed since iOS6 (http://adactio.com/journal/5802/)
and the fix seems to cause weird behavior when zooming in landscape.