Update Bootstrap to v3.0.3.
Use the non-www link.
Compress images with kraken.io.

Savings: 723.36 KB.
Specify <meta http-equiv="X-UA-Compatible" content="IE=edge">.
Update _config.yml.

Disable pygments since no code highlighting is used.
Also exclude README.md from the out dir.
Fix validation errors.
Remove `type="text/javascript"` since it's the default.
Remove the unused _includes/colophon.html.
Use the https links for github and Twitter.
Move stuff that belong to the footer to footer.html.
Remove empty selector and media query.
Clean up .gitignore.
Use an ico for the favicon in root so that it works in all browsers.

Apparently IE 10 still ignores png files for favicons.
Include a 32x32 ico too for high dpi screens.
Add meta keywords, author and description.
Include bootstrap.min.css from bootstrap-expo.css.

-1 HTPP request.
_layouts/default.html: use the relative URL for easier local debugging.
Include only the Bootstrap components that are being used.