Twenty Fourteen: use a more specific selector for tag links.

props iamtakashi.
fixes #26358.

git-svn-id: https://develop.svn.wordpress.org/trunk@26545 602fd350-edb4-49c9-b593-d223f7449a82
Add dashicons CSS classes for easy access by plugins and themes.

props dd32.
fixes #26227.


git-svn-id: https://develop.svn.wordpress.org/trunk@26547 602fd350-edb4-49c9-b593-d223f7449a82