fixed mobile navigation
fixed video wrapping js
Allowing dashes in code names. Closes #1166
Accepting all non-whitespace characters as language names for Pygments code highlighting
Added support for deploying to github.io
Sinatra now correctly returns code 404 when a page is not found. Closes #1198
Updating Octopress.

Signed-off-by: Jean-Denis Vauguet <jd@vauguet.fr>