Updated mediawiki/extensions
Project: mediawiki/extensions/VisualEditor  5b3ed2bc565c6520408ed61f796718910fc36655

Provide a default implementation for OO.ui.msg

Just a simple message map in English. Also document localizaton-related
things in OO.ui

Change-Id: Ie74762238ca66747776610157c838dd75a864463