Remove audio from keeper_shortcodes array as no longer supported.
Merge pull request #257 from kraftbj/audio-wpe

Remove audio from keeper_shortcodes array as no longer supported.
Merge branch 'master' of ssh://github.com/Automattic/jetpack
Avoid mysql error.

On the Oauth authentication process we use the same nonce on two different request. This was causing a Duplicate entry error log that was confusing users.