.hgignore: add vendor tree composer.json: new packages plugins/thunderbird_labels/thunderbird_labels.php: change hook and RFC822 use wrt whitelisting to avoid deprecated stuff index.php: commented debugging hooks others: new releases of vendor packages?

Icons by Fugue Icons <http://p.yusukekamiyamane.com/>

Copyright (C) 2010 Yusuke Kamiyamane. All rights reserved.
The icons are licensed under a Creative Commons Attribution
3.0 license. <http://creativecommons.org/licenses/by/3.0/>