Remove all but one Apple touch icon. Largest size is changed to 152x152 for iOS7. Image is optimized in ImageOptim app. See here for more details: http://mathiasbynens.be/notes/touch-icons
Replace main.css from HTML5 Boilerplate 4.3.0
Merge pull request #57 from codeforamerica/html5-boilerplate-4.3.0

Html5 boilerplate 4.3.0, closes issue #56.