Project website is Sylius.org. :)

I choose this name instead of just "Markdown" to make it more distinguishable.

Thanks fore mentioning it here, btw :)

On PHP.ug you can find an overview of all PHP-Usergroups known to the maintainers. It's also the source of the usergoup-list on php.net/ug.php

Added Securing PHP: Core Concepts by Chris Cornutt to the book list.

Fix typo