Add heartbeat and revisions .min.js files.



git-svn-id: https://core.svn.wordpress.org/trunk@23616 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-alpha-23617.

git-svn-id: https://core.svn.wordpress.org/trunk@23617 1a063a9b-81f0-0310-95a4-ce76da25c4cd