Tooltips for 3.6 features: Revisions, Post Locking.

Props siobhan. See #24832 for trunk.

git-svn-id: http://core.svn.wordpress.org/trunk@24853 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unnecessary cap checks from [24854]. You need these capabilities (or equivalent) to access the screens for these feature pointers. see #24832.



git-svn-id: http://core.svn.wordpress.org/trunk@24855 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update HTML classes in the audio and video shortcodes. props rfair404. fixes #24820.



git-svn-id: http://core.svn.wordpress.org/trunk@24857 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Change 'Change two revisions' to 'Compare any two revisions' for clarity. props siobhan. see #24804.



git-svn-id: http://core.svn.wordpress.org/trunk@24859 1a063a9b-81f0-0310-95a4-ce76da25c4cd