Add a copyright notice to zxcvbn. fixes #25926.


git-svn-id: https://develop.svn.wordpress.org/trunk@26629 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: add link to Codex documentation in Help text, and minor cleanup based on siobhan feedback. See #25837.

git-svn-id: https://develop.svn.wordpress.org/trunk@26630 602fd350-edb4-49c9-b593-d223f7449a82