Cotonti Genoa 0.6.23

#1. What's new in 0.6.23

• CoTemplate 2.7.7
• Login from multiple devices (backported from Siena)
• Added page owner avatar tag in page lists.
• Fixed a typo in language files.

#1.1. Updating from 0.6.22

1. Replace these files with updated files:

   sql/cotonti-install.sql
   system/common.php
   system/core/admin/admin.tools.inc.php
   system/core/forums/forums.topics.inc.php
   system/core/list/list.inc.php
   system/core/users/users.auth.inc.php
   system/core/users/users.inc.php
   system/core/users/users.logout.inc.php
   system/cotemplate.php
   system/functions.php
   

2. Apply sql/patch-0.6.12-0.6.23.sql in phpMyAdmin.