MediaWiki 1.22/wmf2

The latest version (labeled "1.22wmf2") of MediaWiki, the software that powers Wikipedia and its sister sites, is being deployed to all Wikimedia sites in stages, starting on Monday, 15 April 2013 (see the roadmap).

Most important changes

 * Diff on mobile version will now be color-blindness friendly (for protanopia and deuteranopia), with margin right for single characters and new colors for insertion and removal replacing the old ones for insertion and removal.
 * - API: Fix rccontinue handling
 * - API: Fix sorting for iwlinks, langlinks