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

See https://github.com/h5bp/html5-boilerplate/commit/345925f04384b59929d8d39ba428cef548921408


git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25971 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac