Add `devDependencies` badge and switch to shields.io theme.
Normalize package.json.

Re-order properties.
.travis.yml: Fix node.js 0.8 version.
Update site_template/_layouts/default.html.

* remove `chrome=1` `from X-UA-Compatible` since it's obsolete
* remove unneeded end tags
* use https for Twitter and GitHub
Update dependencies.