Updates to the About page:

* A live color scheme preview
* Replace the hard-coded version number
* Copy edits
* New screenshots
* Size adjustments to the header and WP badge
* Capitalize 'Open Sans'

See #26387, props markoheijnen, ryelle, siobhan, melchoyce.


Built from https://develop.svn.wordpress.org/trunk@26737


git-svn-id: http://core.svn.wordpress.org/trunk@26626 1a063a9b-81f0-0310-95a4-ce76da25c4cd