PHP 5.4.16, 5.3.26 and 5.5.0 RC3 released

[smtalk]

Changelog for PHP 5.4 and 5.3: http://php.net/ChangeLog-5.php
Changelog for PHP 5.5 RC3: https://github.com/php/php-src/blob/php-5.5.0RC3/NEWS