MediaWiki 1.22/wmf13

The latest version (labeled "1.22wmf13") of MediaWiki, the software that powers Wikipedia and its sister sites, is being deployed to all Wikimedia sites in stages, starting on Thursday, 15 August 2013 (see the roadmap).

Important Changes

 * New much more slick gallery display
 * https://gerrit.wikimedia.org/r/#/c/67885/
 * Improvements to language variant url handling
 * https://gerrit.wikimedia.org/r/#q,dd841c2a,n,z
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=52852
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=52850
 * Fixed a regression in File: redirects
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=52200
 * A pretty major update of the README file
 * https://gerrit.wikimedia.org/r/#/c/76643/