Extension:StalkerLog

Summary
Simple extension I wrote awhile back for my job, but we ended up not using it. Basically, it adds a log type that keeps track of user logins/logouts. By default viewable to all, but can be restricted with the 'stalkerlog-view-log' role, assignable via $wgGroupPermissions. Added it to MediaWiki svn for others to use if they'd like. Pretty simple and normal install:
 * 1) Download files to ~/extensions/StalkerLog/
 * 2) Add require_once( "extensions/StalkerLog/StalkerLog.php" ); to your LocalSettings file.
 * 3) Enjoy

Changelog

 * v0.6 - (r41476,r41477) Made it fail more gracefully on MW 1.11 and 1.12, which didn't have the $oldUser parameter yet for UserLogoutComplete. Thanks to maeck on IRC for pointing this out.
 * v0.5 - (r38240) Basic functionality, etc. Copied from my development copy at work.