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.


Built from https://develop.svn.wordpress.org/trunk@26719


git-svn-id: http://core.svn.wordpress.org/trunk@26608 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Slight adjustment to centered headlines in About page. See #26387.
Built from https://develop.svn.wordpress.org/trunk@26720


git-svn-id: http://core.svn.wordpress.org/trunk@26609 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Switch this header on the ABout page from title case to sentence case to match the style of all other headers on the page. See #26387.
Built from https://develop.svn.wordpress.org/trunk@26721


git-svn-id: http://core.svn.wordpress.org/trunk@26610 1a063a9b-81f0-0310-95a4-ce76da25c4cd