Updates to the About page:

- Better screenshots
- Align screenshots with the dividers between sections
- Increase body text size
- Add a mention of Twenty Fourteen by name
- i18nalize 'Now with more color'
- Replace &rsquo; with &#8217;

See #26387.



git-svn-id: https://develop.svn.wordpress.org/trunk@26719 602fd350-edb4-49c9-b593-d223f7449a82