Twenty Fifteen: add print styles.

Props iamtakashi, closes #29967



git-svn-id: https://develop.svn.wordpress.org/trunk@29919 602fd350-edb4-49c9-b593-d223f7449a82
Update jQuery UI to 1.11.2.

Changelog: http://jqueryui.com/changelog/1.11.2/

see #29833.

git-svn-id: https://develop.svn.wordpress.org/trunk@29920 602fd350-edb4-49c9-b593-d223f7449a82