Rename Apple touch icon and add `<link>` in the HTML.

See https://github.com/h5bp/html5-boilerplate/commit/345925f04384b59929d8d39ba428cef548921408
Mark project as private.

We don't plan to push the package to npm.
Fix a few ARIA related issues.
Remove `role=button` that was added accidentally in previous commit.
Update dependencies.
Cleanup and accessibility tweaks.
Update Bootstrap to v3.3.0.
Rename index.md to index.html.

It's HTML only.
Remove `img-responsive`.

It's causing the images not to show up at all on IE8. Plus we don't really need it.
Move code where is needed.
Switch to `&bull;` for the title separator.
Remove center alignment from table.
`&middot;` looks even cleaner.
Update dependencies.
Update bootstrap.css.

This is temporary until v3.3.x is out and we have the customizer's autoprefixer fix.
Switch to using bundle for the gems.